Theses:
1. Accelerated Sulfur Vulcanization of Polyisoprene by Benzothiazole Derivatives
M. H. S. Gradwell, Promoter W. J. McGill, January 1994.
2. Tetramethylthiuram Disulfide and 2-mercaptobenzothiazole as Binary Accelerators in Sulfur Vulcanization
B. V. K. M. Giuliani, Promoter W. J. McGill, March 1994.
3. Thiuram Curative and Derivative Interactions and their Mechanism for Accelerated Sulfur Vulcanization of 2,3-Dimethyl-2-butene
M. Geyser, Promoter W. J. McGill, December 1994.
4. Vulcanization Reactions, Networks and Properties of Polyisoprene, Poly(styrene-cobutadiene) and their Blends
P. E. Mallon, Promoter W. J. McGill, February 1997.
5. The Role of Stearic Acid in Tetramethylthiuram Disulfide and 2- Bisbenzothiazole-2,2’- disulfide Accelerated Sulfur Vulcanization
S. R. Shelver, Promoter W. J. McGill, May 1997.
6. Benzothiazole Accelerated Sulfur Vulcanization of 2,3-Dimethyl-2-butene
B. Morgan, Promoter W. J. McGill, January 1998.
7. N, ‘N-Dipentamethylenethiuram Sulfides in Accelerated Sulfur Vulcanization
C. P. Reyneke-Barnard, Promoter W. J. McGill, co-promoter M. H. S. Gradwell, January 1999.
8. Vulcanization Mechanisms of Butyl and Halogenated Butyl Rubbers with ZnO and Tetramethylthiuram Disulfide Accelerated Formulations
K. G. Hendrikse, Promoter W. J. McGill, May 1999.
9. The Effect of Curative Formulations on the Crystallizability and Stress-Strain Behaviour of Vulcanizates
M. J. van der Merwe, Promoter W. J. McGill, co-promoter M. H. S. Gradwell, February 2000.
10. The role of dimethylthiocarbamic acid in accelerated sulfur vulcanization
M. Shumane, Promoter W.J. McGill, co-promoter M H S Gradwell, December 2000
11. N-(Cyclohexylthio)phthalimide inhibition of benzothiazole accelerated vulcanization of squalene
L. Boretti, Promoter C.D. Woolard, March 2002.
12. The role of elastomer and curatives in polyethylene/polyisoprene thermoplastic elastomer blends
K Garde, Promoter C.D. Woolard, February 2004.
13. New models for peroxide and conventional vulcanizates with a new mechanism for strengthening by strain-induced crystallization
M van der Horst, Promoter C.D. Woolard, co-promoter W.J. McGill, July 2004
14. Studies of the a,w-alkanedithiol-ene cross-linking of high vinyl 3,4-polyisoprene rubber
S.P. Hlangothi, Promoter C.D. Woolard, December 2012.
Dissertations:
1. The Effect of Carbon Black on the Mechanism of Thiuram Accelerated Sulfur Vulcanization
S. R. Shelver, Supervisor W. J. McGill, January 1994.
2. Crosslinking Reactions with Metal Oxides and Salts in Polychloroprene
P. E. Mallon, Supervisor D. P. Shillington, co-supervisor W. J. McGill, January 1994.
3. The Formation of Polysulfides of 2-bisbenzothiazole-2,2'-disulfide and their Reaction with 2,3-Dimethyl-2-butene
B. Morgan, Supervisor W. J. McGill, co-supervisor M. H. S. Gradwell, January 1995.
4. Polyisoprene Vulcanization Accelerated by Morpholinobenzothiazole Sulfenamides
K. G. Hendrikse, Supervisor M. H. S. Gradwell, co-supervisor W. J. McGill, January 1995.
5. The Application of Light Scattering Techniques to the Early Stages of Vulcanization
C. P Reyneke-Barnard, Supervisor W. J. McGill, co-supervisor D.P. Shillington, January 1995.
6. The TBBS Accelerated Sulfur Vulcanization of Polyisoprene
M. J. van der Merwe, Supervisor M. H. S. Gradwell, July 1996.
7. A Comparison of the Sulfur Vulcanization of Polyisoprene Accelerated by TETD and TMTD
D. Grooff, Supervisor M. H. S. Gradwell, February 1997.
8. Characterisation of Oil-dispersed Waxes Used in Printing Inks
D. Samson, Supervisor W. J. McGill, co-supervisor M. H. S. Gradwell, December 1997.
9. The Use of Fly-ash as a Reinforcing Filler in Rubber
K. Garde, Supervisor W. J. McGill, co-supervisor C. D. Woolard, November 1998.
10. The Action of N-(Cyclohexylthio)phthalimide as a Prevulcanization Inhibitor
N. R. Stephenson, Supervisor M. H. S. Gradwell, January 1999.
11. Bis(triethoxysilylpropyl) Tetrasulfane as a Coupling Agent for Silica Filled Vulcanizates
L. G. Borretti, Supervisor W. J. McGill, co-supervisor M. H. S. Gradwell, December 1999.
12. Effect of Curative Formulations on the Physical Properties of Natural Rubber/Chlorobutyl Blends
K. M. Petrus, Supervisor C. D. Woolard, co-supervisor W. J. McGill, August 2000.
13. The Importance of Thiol Intermediates in 2-Mercaptobenzothiazole Accelerated vulcanization of 2,3-Dimthyl-2-butene
M. van der Horst, Supervisor C.D. Woolard, co-supervisor K.G. Hendrikse, February 2001
14. The vulcanization of polychloroprene by ethylene thiourea (ETU) and metal oxides
H. Desai, Supervisor K. Hendrikse, co-supervisor C.D. Woolard, June 2003
15. The effect of silica inclusion on blends of natural rubber (NR) and poly(styrene-co-butadiene) (SBR)
R. Bosch, Supervisor C.D. Woolard, June 2003
16. N,N'-dipentamethylenethiuram disulfide accelerated sulfur vulcanization of squalene
M. Mphahlele, Supervisor C.D. Woolard, 2006
17. The accelerated sulfur vulcanization of cis-polyisoprene and squalene by thiuram disulfides
J. van Rooyen, Supervisor C.D. Woolard, 2007
18. The influence of nano zinc sulfide on the bisbenzothiazole-2,2’-disulfide accelerated sulfur vulcanization of natural rubber
Honours and BTech Treatises:
1. A Study of the Effect of High Curative Loadings
S. A. Marais, Supervisor M. H. S. Gradwell, November 1994.
2. Study on Enthalpy of Reaction in the Vulcanization Process
C. S. Putzier, Supervisor M. H. S. Gradwell, November 1994.
3. The Study of Nucleation and Subsequent Crystallization Using Light Scattering Techniques
M. J. van der Merwe, Supervisor W. J. McGill, November 1994.
4. The Effect of MBT on Polymeric Sulfur in the Absence and Presence of Polyisoprene
B. P. Terblanche, Supervisor M. H. S. Gradwell, November 1995.
5. The Study of Nucleation and the Early Stages of Crystal Growth
D. Samson, Supervisor W. J. McGill, November 1995.
6. Evaluation of Network Heterogeneity by means of SEM
R. Finnis, Supervisor W. J. McGill, November 1995.
7. The Effectiveness of MBT-(cyclohexylamine) salt as Vulcanization Accelerator in Polyisoprene
K. Garde, Supervisor W. J. McGill, November 1996.
8. The Effect of Network Heterogeneity on the Properties of the Vulcanizate
L. G. Boretti, Supervisor W. J. McGill, co-supervisor K. G. Hendrikse, November 1996.
9. The Effect of Vulcanization System on Main Chain Modification
N. R. Stephenson, Supervisor W. J. McGill, co-supervisor P. E. Mallon, November 1996.
10. The Conversion of Fly-ash to zeolites
K. Petrus, Supervisor C. D. Woolard, November 1997.
11. Hydrothermally Treated Fly-ash: Zeolite Formation and Lead Adsorption
M. van der Horst, Supervisor C. D. Woolard, November 1998.
12. Zeolite synthesis, characterization and use at removal of organic contaminants from solution.
J. Strong, Supervisor C. D. Woolard, November 1999.
13. A study of the blend properties of a blend of chlorobutyl/polyisoprene rubber
R. Bosch, Supervisor K. G. Hendrikse, November 1999.
14. 1,3-Bis(citraconimidomethyl)benzene as an Antireversion Agent: Possible Interactions with Curatives.
L. Summerton, Supervisor K. G. Hendrikse, October 2000.
15. A Study of the Reduction Kinetics of Chromium (VI) Oxide and the Glow Phenomenon which occurs in Chromium (III) Oxide and Chromium (VI) Oxide.
C. R. Erasmus, Supervisor C. D. Woolard, October 2000.
16. Polybutadiene elastomer chemistry
H. Desai, Supervisor M. H. S. Gradwell, October 2000.
17. The chemical characteristics of recycled poly(ethylene terephthalate) (PET) fibres
N. Boyana, Supervisor C.D. Woolard, December 2000.
18. Physical properties of latex condoms supplied by the South African Deparment of Health and factors that affect these properties.
M. Dzivhani, Supervisor C.D. Woolard, October 2001.
19. Characterization of recycled poly(ethylene terephthalate) fibres
V. Mbhamali, Supervisor C.D. Woolard, October 2001.
20. The use of scrap poly(vinyl butyral) in polymer blends.
J. van Rooyen, Supervisor C.D. Woolard, October 2001.
21. N-(cyclohexylthiophthalimide): A further study of its cure retardation properties
G Saunders, Supervisor C.D Woolard, November 2002.
22. The effect of anti-oxidants on the properties of light emitting polymers
H. Oosthuizen, Supervisor C.D. Woolard, January 2004.
23. Reaction kinetics study of N-(cyclohexylthio)phthalimide and curatives based on isothermal reactions
I. Fredericks, Supervisor C.D. Woolard, December 2004.
24. The synthesis of dimethyl terephthalate
H. Strydom, Supervisor C.D. Woolard, December 2004.
25. N-(cyclohexylthio)phthalimide inhibition of tetramethylthiuram disulfide
D. Williams, Supervisor C.D. Woolard, December 2004.
26. A computer model for modelling rubber stress-strain behaviour
P. Lee, Supervisor C.D. Woolard, December 2005.
27. Steel cord adhesion
Q. Roos, , Supervisor C.D. Woolard, 2007
28. The use of rubber crumb as an adsorbent for the removal of organic waste
K. Nare, Supervisor C.D. Woolard, November 2014
29. Improving the efficiency of diphenyldisulfides as devulcanizing agent
P. Mente, Supervisor C.D. Woolard; co-supervisor C.W. McCleland, November 2014
30. The development of a protocol for identifying and quantifying the curatives in a rubber vulcanizate
S Pakade, Supervisor C.D. Woolard, November 2014
Research Articles
1. The Thermal Decomposition of Sulfenamide Accelerators
M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 51, 169-176 (1994).
2. The Interaction of Sulfenamide Accelerators with Sulfur, ZnO and Stearic Acid in the Absence of Rubber
M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 51, 177-185 (1994).
3. The Relationship Between Strength and Heterogeneity in Polyisoprene Networks
J. H. A. Grobler and W. J. McGill, J. Polym. Sci., Polym. Phys. Ed., 32, 287-295 (1994).
4. Modification of Polypropylene on Blending with Polyisoprene in the Presence of Maleic Anhydride
C. Els and W. J. McGill, Plastics Rubber and Composites: Process.and Appl. 21,115-123 (1994).
5. A Study of the Rate of Formation of Polysulfides of Tetramethylthiuram Disulfide
M. Geyser and W. J. McGill, J. Appl. Polym. Sci., 55, 215-224 (1995).
6. A DSC Study of the Crosslinking of Polychloroprene with ZnO and MgO
P. E. Mallon, W. J. McGill and D. P. Shillington, J. Appl. Polym. Sci., 55, 705-721 (1995).
7. Rate of Formation of Polysulfides of 2-Bisbenzothiazole-2,2'-disulfide in the Presence of Sulfur and 2-Mercaptobenzothiazole
M. H. S. Gradwell, B. Morgan and W. J. McGill, J. Appl. Polym. Sci., 56, 1581-1588 (1995).
8. Tetramethylthiuram Disulfide and 2-Mercaptobenzothiazole as Binary Accelerators in Sulfur Vulcanization. I. Exchange Reactions between the Accelerators and Sulfur in the Absence of Rubber
B. V. K. M. Giuliani and W. J. McGill, J. Appl. Polym. Sci, 57, 1391-1407 (1995).
9. Tetramethylthiuram Disulfide and 2-mercaptobenzothiazole as Binary Accelerators in Sulfur Vulcanization. II. Exchange Reactions between the Accelerators and their Zinc Salts in the Absence of Rubber
B. V. K. M. Giuliani and W. J. McGill, J. Appl. Polym. Sci, 58, 1053-1061 (1995).
10. The Effect of Carbon Black on Tetramethylthiuram Disulfide Accelerated Sulfur Vulcanization of Polyisoprene
W. J. McGill and S. R. Shelver, J. Appl. Polym. Sci, 58, 1433-1440 (1995).
11. Sulfur Vulcanization of Polyisoprene Accelerated by Benzothiazole Derivates. I. Comparison of Sulfur and 2-mercaptobenzothiazole Accelerated Reactions
M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 58, 2185-2191 (1995).
12. Sulfur Vulcanization of Polyisoprene Accelerated by Benzothiazole Derivates. II. The Reaction of 2-Mercaptobenzothiazole and its Zinc Salt with Sulfur and ZnO in Polyisoprene
M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 58, 2193-2200 (1995).
13. Thiuram-accelerated Sulfur Vulcanization. Part 1. The Formation of the Active Sulfurating Agent
M. Geyser and W. J. McGill, J. Appl. Polym. Sci., 60, 425-430 (1996).
14. Thiuram-accelerated Sulfur Vulcanization. Part 2. The Formation of Crosslink Precursors
M. Geyser and W. J. McGill, J. Appl. Polym. Sci., 60, 431-437 (1996).
15. Thiuram-accelerated Sulfur Vulcanization. Part 3. The Formation of Crosslinks
M. Geyser and W. J. McGill, J. Appl. Polym. Sci., 60, 439-447 (1996).
16. Thiuram-accelerated Sulfur Vulcanization. Part 4. Zinc Dimethyldithiocarbamate - Accelerated Sulfur Vulcanization
M. Geyser and W. J. McGill, J. Appl. Polym. Sci., 60, 449-454 (1996).
17. Tetramethylthiuram Disulfide and 2-Mercaptobenzothiazole as Binary Accelerators in Sulfur Vulcanization. IV. Vulcanization of Polyisoprene in the Presence of ZnO.
B. V. K. M. Giuliani and W. J. McGill, J. Appl. Polym. Sci., 62, 647-653 (1996).
18. Tetramethylthiuram Disulfide and 2-Mercaptobenzothiazole as Binary Accelerators in Sulfur Vulcanization. III. Vulcanization of Polyisoprene in the Absence of ZnO.
B. V. K. M. Giuliani and W. J. McGill, J. Appl. Polym. Sci., 62, 1057-1066 (1996).
19. Sulfur Vulcanization of Polyisoprene Accelerated by Benzothiazole Derivatives. III. The reaction of 2-Bisbenzothiazole-2,2'-disulfide with Sulfur and ZnO in Polyisoprene.
M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 61, 1131-1136 (1996).
20. Sulfur Vulcanization of Polyisoprene Accelerated by Benzothiazole Derivatives. IV. The reaction of Polyisoprene with N-Cyclohexyl-benzothiazole Sulfenamide, Sulfur, and Zinc Oxide.
M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 61, 1515-1523 (1996).
21. Reactions of 2-(4-Morpholinothio)- and 2-(4-Morpholinodithio) benzothiazole in the Presence of Polyisoprene
K. G. Hendrikse, M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 66,1093-1099 (1997).
22. Thiuram- and Dithiocarbamate- Accelerated Sulfur Vulcanization from the Chemist’s Perspective: Methods, Materials and Mechanisms Reviewed
P. J. Nieuwenhuizen, J. Reedijk, M. van Duin, and W. J. McGill, Rubber Chem. Technol., Rubber Reviews, 70, 368 (1997).
23. A Mechanical and Morphological Study of Polyurethane/Polystyrene Interpenetrating Polymer Networks Containing Ionic Groups
D. J. Hourston, F-U Schafer, N. J. Walters and M. H. S. Gradwell, J. Appl. Polym. Sci., 67, 1973 (1998).
24. TMXDI-based Poly(ether urethane)/polystyrene Interpenetrating Polymer Networks : 1. Morphology and Properties
D. J. Hourston, F-U Schafer, J. S. Bates and M. H. S. Gradwell, Polymer, 39, 3311 (1998).
25. TMXDI-based Poly(ether urethane)/polystyrene Interpenetrating Polymer Networks : 2. Tg Behaviour, Mechanical Properties and Modulus-Composition Studies
D. J. Hourston, F-U Schafer, M. Song and M. H. S. Gradwell, Polymer, 39, 5609 (1998).
26. High-Resolution Thermogravimetric Analysis of Polyurethane/Poly(ethyl methacrylate) Interpenetrating Polymer NetworksM. H. S. Gradwell, D. J. Hourston, T. Pabunruang, F-U Schafer and M. Reading, J. Appl. Polym. Sci., 70, 287 (1998).
27. Modelling of the Cation Binding Properties of Fulvic Acids: an Extension of the RANDOM Algorithm to Include Nitrogen and Sulphur Donor Sites
C. D. Woolard, P. W. Linder, The Science of the Total Environment, 226, 35-46 (1999).
28. Surface Modification of Fly-ash. Characterisation and Evaluation as Reinforcing Filler in Polyisoprene
K. Garde, W. J. McGill and C. D Woolard, Plastics, Rubber and Composites 28, 1-10 (1999).
29. The Reactions of 2-(4-Morpholinothio)- and 2-(4-Morpholinodithio) benzothiazole in the Absence of Polyisoprene.
K. G. Hendrikse, M. H. S. Gradwell and W. J. McGill, J. Appl. Poly. Sci., 72, 1235-1240 (1999).
30. Effect of Carboxylic Acids on 2-Bisbenzothiazole-2,2’-Disulfide- and Tetramethylthiuram Disulfide-Accelerated Sulfur Vulcanization. 1. Reactions between the Acids and Accelerators
W. J. McGill and S. R. Shelver, J. Appl. Polym. Sci., 72, 999-1006 (1999).
31. Effect of Carboxylic Acids on 2-Bisbenzothiazole-2,2’-Disulfide- and Tetramethylthiuram Disulfide-Accelerated Sulfur Vulcanization. II. Vulcanization of Polyisoprene in the Absence of ZnO
W. J. McGill and S. R. Shelver, J. Appl. Polym. Sci., 72, 1007-1012 (1999).
32. Effect of Carboxylic Acids on 2-Bisbenzothiazole-2,2’-Disulfide- and Tetramethylthiuram Disulfide-Accelerated Sulfur Vulcanization. III. Reaction Between Accelerators and Zinc Salts of the Acids
W. J. McGill and S. R. Shelver, J. Appl. Polym. Sci., 72, 1013-1020 (1999).
33. Effect of Carboxylic Acids on 2-Bisbenzothiazole-2,2’-Disulfide- and Tetramethylthiuram Disulfide-Accelerated Sulfur Vulcanization. IV. Vulcanization of Polyisoprene Compounds with ZnO
W. J. McGill and S. R. Shelver, J. Appl. Polym. Sci., 72, 1021-1030 (1999).
34. Oil-dispersed Waxes for Printing Inks Part I: Techniques for Characterising Particles and Effect of Cooling Rate on Particles
D. A. Samson, M. H. S. Gradwell and W. J. McGill, Surface Coatings International, 82 (5), 241-244 (1999).
35. Oil-dispersed Waxes for Printing Inks Part II: Effect of Chemical Composition and Production Procedure on Particle Characteristics and Performance in Prints
D. A. Samson, M. H. S. Gradwell and W. J. McGill, Surface Coatings International, 82 (6), 280-284 (1999).
36. Reactions of t-Butylbenzothiazole Sulfenamide with Sulfur and Zinc Oxide in the Absence of Rubber.
M. H. S. Gradwell and M. J. van der Merwe, Rubb. Chem. Tech. 72, 55-64 (1999).
37. The t-Butylbenzothiazole Sulfenamide Accelerated Sulfur Vulcanization of Polyisoprene.
M. H. S. Gradwell and M. J. van der Merwe, Rubb. Chem. Tech., 72, 65-73 (1999).
38. The limiting value of ZDMC formation: new insight into the reaction of ZnO and TMTD
P. J. Nieuwenhuizen, M. van Duin, J. G. Haasnoot, J. Reedijk and W. J. McGill, J. Appl. Polym. Sci., 73, 1247 (1999).
39. Polyisoprene, poly(styrene-cobutadiene), and their blends. I. Vulcanization reactions with tetramethylthiuram disulfide/sulfur
P. E. Mallon and W. J. McGill, J. Appl. Polym. Sci., 74, 1250-1263 (1999).
40. Polyisoprene, poly(styrene-cobutadiene), and their blends. II. Vulcanization reactions with 2-bisbenzothiazole-2,2’-disulfide/sulfur
P. E. Mallon and W. J. McGill, J. Appl. Polym. Sci., 74, 1264-1270 (1999).
41. The role of dimethyldithiocarbamic acid in accelerated sulfur vulcanization
S. R. Shelver, M. Shumane, M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 74, 1371-1378 (1999).
42. Polyisoprene, poly(styrene-cobutadiene), and their blends. III. Tensile properties of tetramethylthiuram disulfide/sulfur and 2-bisbenzothiazole-2,2’-disulfide/sulfur compounds
P. E. Mallon and W. J. McGill, J. Appl. Polym. Sci., 74, 2143-2148 (1999).
43. The contribution of Income Components to Income Inequality in South Africa, A Decomposable Gini Analysis
M. V. Leibbrandt, C. D. Woolard and I. D. Woolard, J. Afr. Economies., 9, 79-99 (2000).
44. Benzothiazole-Accelerated Sulfur Vulcanization. I. 2-Mercaptobenzo-thiazole as Accelerator for 2,3-Dimethyl-2-butene.
B. Morgan and W. J. McGill, J. Appl. Polym. Sci., 76, 1377 (2000).
45. Benzothiazole-Accelerated Sulfur Vulcanization. II. 2-Mercaptobenzo-thiazole/Zinc Oxide and Bis(2-mercaptobenzothiazole)Zinc(II) as Accelerators for 2,3-Dimethyl-2-butene.
B. Morgan and W. J. McGill, J. Appl. Polym. Sci., 76, 1386 (2000).
46. Benzothiazole-Accelerated Sulfur Vulcanization. III. 2-Bisbenzo-thiazole-2,2’-disulfide as Accelerator for 2,3-Dimethyl-2-butene.
B. Morgan and W. J. McGill, J. Appl. Polym. Sci., 76, 1395 (2000).
47. Benzothiazole-Accelerated Sulfur Vulcanization. IV. Effect of ZnO and Bis(2-mercaptobenzothiazole)Zinc(II) on 2-Bisbenzothiazole-2,2’-polysulfide Formation in 2-Bisbenzothiazole-2,2’-disulfide and 2-Bisbenzothiazole-2,2-disulfide/Sulfur.
B. Morgan and W. J. McGill, J. Appl. Polym. Sci., 76, 1405 (2000).
48. Benzothiazole-Accelerated Sulfur Vulcanization. V. 2-Bisbenzothiazole-2,2’-disulfide/ZnO and 2-Bisbenzothiazole-2,2’-disulfide/(2-mercapto-benzothiazole)Zinc(II) as Accelerators for 2,3-Dimethyl-2-butene.
B. Morgan and W. J. McGill, J. Appl. Polym. Sci., 76, 1413 (2000).
49. Effect of tetramethylthiuram disulphide on bis(triethoxysilylpropyl) tetrasulphane as coupling agent for silica in polyisoprene.
L. G. Boretti, M. H. S. Gradwell and W. J. McGill, Plastics, Rubber and Composites, 29 (3), 144, (2000).
50. The Use of a Modified Fly Ash as an Adsorbent for Lead
C. D. Woolard, K. Petrus and M. van der Horst, Water SA, 26 (4), 531, (2000).
51. N,N’-Pentamethylenethiuram Disulfide- and N,N’-Pentamethylenethiuram Hexasulfide-Accelerated Sulfur Vulcanization. I. Interaction of Curatives in the Absence of Rubber
C. P. Reyneke-Barnard, M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 77, 2718 (2000).
52. N,N’-Pentamethylenethiuram Disulfide- and N,N’-Pentamethylenethiuram Hexasulfide-Accelerated Sulfur Vulcanization. II. Relative stability of N,N’-Pentamethylenethiuram Disulfide and Tetramethylthiuram Disulfide with respect to Amine Formation.
C. P. Reyneke-Barnard, M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 77, 2732 (2000).
53. N,N’-Pentamethylenethiuram Disulfide- and N,N’-Pentamethylenethiuram Hexasulfide-Accelerated Sulfur Vulcanization. III. Vulcanization of Polyisoprene and 2,3-Dimethyl-2-Butene in the Absence of ZnO
C. P. Reyneke-Barnard, M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 78, 1100-1111 (2000).
54. N,N’-Pentamethylenethiuram Disulfide- and N,N’-Pentamethylenethiuram Hexasulfide-Accelerated Sulfur Vulcanization. III. Vulcanization of Polyisoprene and 2,3-Dimethyl-2-Butene in the Presence of ZnO
C. P. Reyneke-Barnard, M. H. S. Gradwell and W. J. McGill, J. Appl. Polym. Sci., 78, 1112-1120 (2000).
55. Vulcanization of Chlorobutyl Rubber. I. The Identification of Crosslink Precursors in Compounds Containing ZnO/ZnCl2.
K. G. Hendrikse, W. J. McGill, J. Reedijk and P. W. Nieuwenhuizen, J. Appl. Polym. Sci., 78, 2290 (2000).
56. Vulcanization of Chlorobutyl Rubber. II. A Revised Cationic Mechanism of ZnO/ZnCl2 Initiated Crosslinking.
K. G. Hendrikse, W. J. McGill, J. Appl. Polym. Sci., 78, 2302 (2000).
57. Vulcanization of Chlorobutyl Rubber III. Reaction Mechanisms in Compounds Containing Combinations of Zinc Dimethyldithiocarbamate, Tetramethylthiuram Disulfide, Sulfur and ZnO
K.G. Hendrikse, W.J. McGill J.Appl. Polym. Sci., 79, 1309-1316 (2001)
58. Covulcanization of Natural Rubber and Chlorobutyl Rubber. Effect of Curative Diffusion between Phases and ZnCl2 Addition
K.M. Petrus, C.D. Woolard, W.J. McGill, Plastics, Rubber and Composites 30, 147-153 (2001)
59. Crystallization of Vulcanizates I. Low Temperature Crystallization as a Function of Extent of Cure for Polyisoprene Vulcanized with Tetramethylthiuram Disulfide/Sulfur and 2-Bisbenzothiazole-2,2'-disulfide/sulfur
M.J. van der Merwe, M.H.S. Gradwell, W.J. McGill, J. Appl. Polym. Sci. 81, 2565-2572 (2001)
60. Crystallization of Vulcanizates II. Low Temperature Crystallization as a Function of Extent of Cure for Polybutadiene Vulcanized with Dicumyl Peroxide, Tetramethylthiuram Disulfide, 2-Bisbenzothiazole-2,2'-disulfide, and Zinc Accelerator Complexes
M.J. van der Merwe, M.H.S. Gradwell, W.J. McGill, J. Appl. Polym. Sci., 81, 2573-2586 (2001)
61. Influence of pendent groups on the tensile properties of polyisoprene vulcanizates
M.J. van der Merwe, M.H.S. Gradwell, W.J. McGill, J. Appl. Polym. Sci., 81, 2587-2596 (2001)
62. Comparison of tetraethyl- and tetramethylthiuram disulfide vulcanization. I. Reactions in the absence of rubber
M. H. S. Gradwell, D. Grooff, J. Appl. Polym. Sci., 80, 2292-2299 (2001)
63. The action of N-(Cyclohexylthio)phthalimide as a prevulcanization inhibitor of 2-bisbenzothiazole-2,2’-disulfide accelerated sulfur vulcanization
M.H.S. Gradwell, N.R. Stephenson, Rubb. Chem. Tech. 74, 44-56 (2001)
64. Dimethylammonium dimethyldithiocarbamate-accelerated sulfur vulcanization. I. Thermal stability and reaction with curatives
M. Shumane, M. H. S. Gradwell, W. J. McGill J. Appl. Polym. Sci., 82, 3067-3073 (2001)
65. Dimethylammonium dimethyldithiocarbamate-accelerated sulfur vulcanization. II. Vulcanization of rubbers and model compound 2,3-dimethyl-2-butene
M. Shumane, M. H. S. Gradwell, W. J. McGill J. Appl. Polym. Sci., 82, 3074-3083 (2001)
66. Comparison of tetraethyl- and tetramethylthiuram disulfide vulcanization. II. Reactions in rubber
M. H. S. Gradwell, D. Grooff, J. Appl. Polym. Sci., 83, 1119-1127 (2002).
67. Evaluation of the use of modified coal ash as a potential sorbent for organic waste streams
CD Woolard, J Strong and C Erasmus, Applied Geochemistry, 17, 1159-1164 (2002).
68. Effect of water and hydrogen sulfide in zinc dimethyldithiocarbamate accelerated sulfur vulcanization
M Shumane, MHS Gradwell and WJ McGill, J Appl Polym Sci, 86, 1516-1531 (2002).
69. The role of thiol intermediates in the 2-mercaptobenzothiazole accelerated sulfur vulcanization of rubber model compounds
M van der Horst, CD Woolard and KG Hendrikse, J. Appl. Polym. Sci. 89, 47-54, (2003).
70. Erratum : “Evaluation of the use of modified coal ash as a potential sorbent for organic waste streams
CD Woolard, J Strong and C Erasmus, Applied Geochemistry 18, 1279, (2003).
71. The surface chemical properties of high surface area solids synthesised from coal fly ash
PJ Pretorius and CD Woolard, S Afr J Chem . 56, 34-39 (2003).
72. An appropriate model compound for the accelerated sulfur vulcanization of polyisoprene. I. The mechanism of bisbenzothiazole-2,2’-disulfide accelerated vulcanization of squalene in the absence of ZnO
L Boretti and C Woolard, Rubber Chem Technol 79, 135-151 (2006)
73. The tensile properties of strain‑crystallising vulcanisates. I. A new theory to explain strengthening,)
M van der Horst, W McGill and C Woolard, J Appl Polym Sci 101,1562-1569 (2006)
74. The tensile properties of strain‑crystallising vulcanisates. II. Stress relaxation and hysteresis
M van der Horst, W McGill and C Woolard, J Appl Polym Sci 101, 2423-2430 (2006)
75. The tensile properties of strain-crystallising vulcanisates. III. The superiority of conventional over peroxide vulcanisates in terms of network micro-structure
M van der Horst, W McGill and C Woolard, J Appl Polym Sci 102, :876-884 (2006)
76. Investigation of the degradation of a thin-film hydrogenated amorphous silicon photovoltaic module
E van Dyk, A Audouard, E Meyer and C Woolard, Solar Energy Materials and Solar Cells 91, 167-173 (2007)
77. Vulcanisation of polychloroprene rubber. I. A revised cationic mechanism for ZnO crosslinking
H Desai, K Hendrikse and CD Woolard, J Appl Polym Sci 105, 865-876 (2007)
78. α, ω-Alkanedithiol cross-linking of high vinyl 3, 4-polyisoprene. Plastics, Rubber and Composites
SP Hlangothi, CD Woolard, BG Hlangothi, Article ID 1743289814Y.0000000092, DOI: http://dx.doi.org/10.1179/1743289814Y.0000000092 (2014)
Other Refereed Research Articles
1. Reaktionen von 2-t-Butylbenzothiazolsulfenamiden mit Schwefel und Zinkoxid in Abwesenheit von Kautschuk.
M. H. S. Gradwell and M. J. van der Merwe, Gummi Fasern Kunstoffe 53 (2), 90-95 (2000).
2. Die mit 2-t-Butylbenzothiazolsulfenamid beschleunigte Schwefelvulkanisation von Polyisopren.
M. H. S. Gradwell and M. J. van der Merwe, Gummi Fasern Kunstoffe 53 (4), 241-246 (2000)
Unrefereed Publications or Reports
1. Rubber Southern Africa, 13, 16 (July/August 1997)
Crosslinking industry and academia
W. J. McGill
2. Pre-vulcanization Inhibition.
M. H. S. Gradwell and N. J. Stephenson, Rubber Southern Africa, Jan/Feb, 9 (1998).
3. Plasfill5 as a reinforcing filler
K Garde, C Woolard and M McGill
Progress report to Ash Resources, December 1997
4. Report to Caltex on equilibrium swelling predictions for polypropylene used in petrol tanks, July 1999
L Boretti, M Gradwell and C Woolard
5. Evaluation of Scrap Rubber
K. G. Hendrikse, B. J. McFazdean and M. H. S. Gradwell
Heever Rubber Reclamation, August 2000
6. An Investigation of the Tensile Properties of a PVC Coated Polyester Conveyer Belt
M. H. S. Gradwell, L. G. Boretti and K. Petrus
For Goodyear SA, August 2000
7. K Petrus and C Woolard
Report to S Palmer, Waste-Tech, on the physical properties of leachate samples
June 2000
8. C Woolard
Report to H Pienaar, Zipski, on melting point of Corax bags
August 2000
9. C Woolard
Report to H Fourie, Volkswagen, on identification of unknown polymer
August 2000
10. C Woolard and R Bosch
Report to R Claassen, Enviroquest, on identification of rubber in seal
April 2001
11. W Gerber, C Woolard and R Bosch
Report to D Smith, Anglogold-Ergo, on chloride analysis of rubber samples for incineration
April 2001
12. C Woolard and R Bosch
Report to R Wewege, Bay Tool & Die, on EPDM compound characteristics before and after ageing
May 2001
13. C Woolard
Report to R Claassen, Enviroquest, on thermal characteristics of problematic PVC
May 2001
14. C Woolard and H Desai
Report to M Robinson, Continental Tyre SA, on the chemical characteristics of 2 hexamethylmethoxymelamine silica-adsorbed samples
June 2001
15. C Woolard and R Bosch
Report to G Palm, Palm Engineering, on the chemical composition of metallic clutch powder
June 2001
16. C Woolard and H Desai
Report to A Spies, CSIR M&M Tek PE, on the thermal history of problematic nylon warp and weft fibres.
June 2001
17. C Woolard and K Petrus
Report to J O’Connell, CSIR Transport Technology, on analysis of tyre crumb
August 2001
18. C Woolard and R Bosch
Report to D Sadler, TOSAS, on analysis of tyre crumb
September 2001
19. C Woolard and R Bosch
Report to P Enslin, Sentech, on the performance of Toyota fuel hoses
November 2001
20. C Woolard, R Bosch and H Desai
Report to R Wewege, Bay Tool & Die, on the physical properties and cure characteristics of EPDM compounds
December 2001
21. C Woolard and R Bosch
Report to P Enslin, Sentech, on the performance of Toyota breather hoses
December 2001
22. C Woolard and R Bosch
Report to D van Rooyen, S&N Rubber, on physical properties of NBR compounds
January 2002
23. C Woolard
Report to M Robinson, Continental Tyre SA, on the melting points of supplied raw material bags
March 2002
24. C Woolard
Report to R Lund, Sappi Fine Paper, on the source of problematic plastic inclusions in paper samples
March 2002
25. C Woolard, R Bosch, H Desai and K Petrus
Report to R Wewege, Bay Tool & Die, on the physical properties of rubber compounds
March 2002
26. C Woolard
Further report to M Robinson, Continental Tyre SA, on the melting points of new raw material bags
March 2002
27. C Woolard
Further report to M Robinson, Continental Tyre SA, on the melting points of new raw material bags
April 2002
28. C Woolard and R Bosch
Report to B Williams, SAFETECH, on origin of fine powder problems experienced by SAB
April 2002
29. C Woolard
Report to C Saunders, Chemquest, on chemical nature of unknown polymer fibres
May 2002
30. C Woolard and K Petrus
Report to R Claassen, Enviroquest, on chemical nature of recycled polymer
May 2002
31. C Woolard
Report to M Robinson, Continental Tyre SA, on the melting behaviour of EVA co-polymers
September 2002
32. C Woolard, K Petrus and R Bosch
Report to Dr W van Niekerk, Infotox, on the chlorine content and rubber type of various scrap rubbers with a view to their incineration
September 2002
33. C Woolard and R Bosch
Report to M Robinson, Continental Tyre SA, on the elemental composition of problematic precipitate obtained from dipping tanks
October 2002
34. C Woolard, J van Rooyen and H Desai
Report to J Chasen, Reclamation Group, on the molecular mass of deconstituted tyre samples
November 2002
35. C Woolard, K Garde and H Oosthuizen
Report to M Robinson, Continental Tyre SA, on the glass transition temperatures of rubber samples by TMDSC
November 2002
36. C Woolard and H Oosthuizen
Further report to J Chasen, Reclamation Group, on the molecular mass of deconstituted tyre samples
December 2002
37. C Woolard and J van Rooyen
Report to J Chasen, Reclamation Group, on molecular mass and fractionation analysis of liquid rubber sample
February 2003
38. C Woolard, H Desai and J van Rooyen
Report to D Ireland, Delta Motor Corporation, on failure analysis of polychloroprene CV boots
February 2003
39. C Woolard
Report to J Chasen, Reclamation Group, on the influence of molecular weight on the tyre manufacturing process
February 2003
40. C Woolard and K Garde
Report to J Solomons, Julius Solomons Industries, on problems experienced during cable sheathing with rubber coated fabric at Aberdare Cables
April 2003
41. C Woolard
Report to M Penny, Hosaf Fibres, on problems experienced during the spinning of PET fibres
April 2003
42. K Garde and C Woolard
Report to P Buys, Everlast Pallets, on the filler content in recycled polyethylene
June 2003
43. C Woolard
Report to N Rudman, Theodor Herzl Schools, on the performance of learners in Grade 11 and 12 mathematics
July 2003
44. C Woolard and J van Rooyen
Report to D van Rooyen, S & N Rubber, on the glass transition of rubber samples
July 2003
45. C Woolard
Report to L Schoeman, Loon and Connellan, on the failure of a motor vehicle radiator hose
July 2003
46. C Woolard, K Garde, F Odei-Addo and G Saunders
Report to Mr Vorster, Coastline Packaging, on properties of packaging supplied for halaal meats
August 2003
47. C Woolard and J van Rooyen
Report to M Penny, Hosaf Fibres, on problems experienced during the manufacture of PET bottle pre-forms
September 2003
48. C Woolard and R Bosch
Report to M Penny, Hosaf Fibres, on problems experienced during PET bottle blowing
October 2003
49. C Woolard and M van der Horst
Report to R Claasen, Enviroquest, on physical property analysis of graphite-filled PTFE piston sheathing (EQ 1004)
October 2003
50. C Woolard and I Woolard
Report to the BIG coalition on the funding of a potential basic income grant (BIG) in South Africa
November 2003
51. C Woolard
Report to C Vorster, Continental Tyre SA, on the deformulation of tyre vulcanizates
November 2003
52. C Woolard and J van Rooyen
Report to C Vorster, Continental Tyre SA, on the evaluation of the melting behaviour of EVA polymers
November 2003
53. C Woolard
Report to M Gie, Volkswagen SA, on problems experience with neoprene wiper blades
November 2003
54. C Woolard and M van der Horst
Report to C Saunders, Chemquest, on physical properties of rubber O-rings
November 2003
55. C Woolard and J van Rooyen
Report to M Penny, HOSAF Fibres, on problems experienced with coloured pre-forms
December 2003
56. I Woolard and C Woolard
A Strategic Review of the Eastern Cape Labour Marker, Chapter 2, The Nature Size and Composition of the Eastern Cape Labour Market, HSRC.
January 2004
57. C Woolard
Report to M Gie, Volkswagen SA on problems experience with PP spoilers
February 2004
58. C Woolard
Report to C Saunders, Chemquest, on hardness of various motor parts manufactured by Smiths
February 2004
59. C Woolard and G Saunders
Report to C Saunders, Chemquest, on physical properties of failing Abeyla potable water sealing washers
February 2004
60. C Woolard and J van Rooyen
Report to A Gericke, Continental Tyre SA, on the carbon number distributions of processing waxes
March 2004
61. C. Woolard
Report to J Rajput, Engelhard, on thermal analysis of rhodium oxalate solutions
June 2004
62. C Woolard and K Petrus
Report to P Swart and C Vorster, Continental Tyre, on crystal bloom formed during tyre production
June 2004
63. C Woolard and K Petrus
Report to C Saunders, Chemquest, on physical properties of Toyota air hoses
June 2004
64. C Woolard
Report to P Swart and C Vorster, Continental Tyre, on thermal characteristics of polymeric sulfur
July 2004
65. C Woolard
Report to C Vorster, Continental Tyre SA, on the melting behaviour of EVA co-polymers
July 2004
66. C Woolard and M van der Horst
Report to J Strydom, GMSA, on problems experienced with EPDM radiator hoses with possible solutions
August 2004
67. C Woolard and M van der Horst
Report to J Strydom, GMSA, on variation in EPDM radiator hoses between production and engineering samples
October 2004
68. I Woolard and C Woolard
Wage Dispersion in South Africa: Household Survey Evidence, 1995-2003, Draft working paper, HSRC, Pretoria
October 2004
69. C Woolard and J van Rooyen
Report to M Penny, Hosaf, on the heavy metal content of PET samples
October 2004
70. C Woolard and K Garde
Report to C Coetzee and A Kleynhans, Continental Tyre, on the significance a particular formulation of rubber compound used in rubber brushes
November 2004
71. C Woolard, K Garde and H Strydom
Report to M Penny, Hosaf, on the molecular mass of commercial PET samples
December 2004
72. C Woolard and I Woolard
An assessment of eligibility for social grants as estimated from the 2001 Census, Report to the Department of Social Development, Pretoria
December 2004
73. K Garde, C Woolard and M van der Horst
Report to R Wewege, Bay Tool and Die, on the physical properties of some rubber compounds
January 2005
74. C Woolard
Report to Dr S Shelver, Goodyear, on the source of cut problems in extruded tyre sidewalls
January 2005
75. I Woolard, C Simkins, M Oosthuizen and C Woolard
Final Report, Tax Incidence Analysis, for the Fiscal Incidence Study being conducted for National Treasury
February 2005
76. C Woolard
Report to C van Rensburg, Radcon Engineering, on the analysis of nylon gears
February 2005
77. C Woolard and M van der Horst
Report to J Strydom, GMSA, on performance of new production radiator hoses
March 2005
78. C Woolard
Report to G Smith, Volkswagen on the pyrolysis and FTIR analysis of an unknown seal vulcanizate
April 2005
79. C Woolard
Report to N Ferreira, Aberdare Cables, on the carbon black content of PE cables
April 2005
80. C Woolard
Report to D Sadler, TOSAS, on the analysis of rubber crumb
April 2005
81. C Woolard, K Garde and H Strydom
Report to M Penny, Hosaf, on the molecular mass of commercial PET samples, with and without antiblock
April 2005
82. C Woolard
Report to G Smith, Volkswagen on the deformulation of fuel tank seals by TGA and FTIR
April 2005
83. C Woolard
Report to A Gericke, Continental Tyre, on the identification of an unknown vulcanizate
June 2005
84. C Woolard and R Bosch
Report to K Garde, Carst and Walker, on the microanalysis of powder samples obtained from white tyre sidewalls
June 2005
85. C Woolard
Report to K Mogonedi, CSIR, on the deformulation of rubber crumb samples
June 2005
86. C Woolard
Report to N Ferreira, Aberdare Cables, on the chemical composition of electrical power cables
July 2005
87. C Woolard
Report to R Gysman, Continental Tyre, on the melting behaviour of EVA samples
July 2005
88. C Woolard
Report to A Gericke, Continental Tyre, on overcured tyre compound
August 2005
89. C Woolard
Report to C Vorster, Continental Tyre, on Romanian EVA samples
August 2005
90. C Woolard
Report to R Gysman, Continental Tyre, on the silica content of rubber compounds
September 2005
91. C Woolars
Report to G Smith, Volkswagen SA, on the thermal analysis of POM samples
2005
92. C Woolard
Report to K Garde, Carst and Walker, on the composition of Zimsperse
2006
93. C Woolard
Report to K Garde, Carst and Walker, on the chemical composition of Struktol A60
2006
94. C Woolard,
Report to K Garde, Carst and Walker, on the identification of a polymeric carrier used for anti-oxidants
2006
95. C Woolard,
Report to K Garde, Carst and Walker, on a comparison of two process additive resins
2006
96. C Woolard
Report to C Vorster, Continental Tyre, on the melting point behaviour of a PE dump bag
2006
97. C Woolard
Report to B Hutchinson, Continental Tyre, on the thermogravimetric analysis of a series of tyre compounds
2006
98. C Woolard
Report to S Shelver, Goodyear, on the origin of porosity in a tread compound
2006
99. C Woolard
Report to K Beyleveld on the composition of recycled plastic sheeting
2006
100. C Woolard
Report to K Garde, Carst and Walker, on the characterization of coumarone-indene resin
2006
101. C Woolard
Report to K Garde, Carst and Walker, on the characterization of high curing temperature NBR compounds
2006
102. C Woolard and G Saunders
Report to M Olivier, GMSA, on the high temperature behaviour of radiator hoses
2006
103. C Woolard
Report to C Evert, Guestro Steering Gears, on the identification of rubber components used in steering devices
2006
104. C Woolard
Report to J Pandelaere, Industex, on the deformulation of a rubber compound
2006
105. C Woolard
Report to D van Rooyen, S&N rubber, on the extraction and identification of plasticizer in rubber
2006
106. C Woolard
Report to C Vorster, Continental Tyre, on the thermal analysis of selected rubber compounds
2006
107. C Woolard
Report to C Saunders, Chemquest, on the glass transition temperatures of some rubber compounds
2006
108. C Woolard
Report to W Hiepner, Webber, Wentzel and Bowman, on problems encountered during the application of cold-cured rubber lining in a mining application
2006
109. C Woolard
Report to J Adams, Solar23, on an assessment of current technologies for the production of solar-grade silicon (SoG-Si)
2007
110. C Woolard and S von Berg
Report to M Mhletywa, Axalta-Plascon, Compositional investigations of paint specks
2014
111. C Woolard and S von Berg
Report to P Swart, New Reclamation Group, Thermal analytical investigations of tyre-derived materials.
2014
Books, Contribution to Books, Conference Proceedings (refereed)
1. Murray V Leibrandt, Christopher D Woolard and Ingrid D Woolard
Living Standards Measurement Study Working paper Number 125
The Contribution of Income Components to Income Inequality in South Africa, A Decomposable Gini Analysis
Published by the World Bank, Washington D.C (1996)
ISBN 0-8213-3637-1
2. 28th NATAS Annual Conference on Thermal Analysis and Applications, ORLANDO, USA (October 2000). North American Thermal Analysis Society.
Determination of Bound rubber and Filler Distribution in Elastomer Blends by Thermogravimetric Analysis.
C. D. Woolard and B. J. McFadzean
3. Microscopy Society of Southern Africa, Volume 30, 2000
Grahamstown, South Africa, December 2000.
K. Garde and M. H. S. Gradwell
4. Microscopy Society of Southern Africa, Volume 33, 2003
Cape Town, South Africa, December 2003
R. Bosch and C. Woolard
5. I Woolard and C Woolard
Occasional paper, Earnings inequality in South Africa, ISBN 978-0-7969-2173-4, Pretoria: HSRC Press (2006)
Patents (granted)
1. Rubber compositions, WO/2007/135650, also EP 2027204 A1 (2009) and US 8,076,404 (2011)2007
C Woolard , K Garde and R Bosch,
2. A novel route to the production of colloidal transition metal nano oxides and sulfides, WO/2007/135649, also EP 2029488 (2011)
C Woolard, D Williams, J van Rooyen, K Garde, R Bosch and S Strydom
Research Papers Read at Scientific Congresses (Oral and poster)
1. S.A. Chemical Institute, 32nd Convention, JOHANNESBURG (January 1994)
Accelerated sulfur vulcanization: The formation of polysulfidic accelerator complexes
M. Geyser, M. H. S. Gradwell and W. J. McGill
2. S.A. Chemical Institute, 32nd Convention, JOHANNESBURG (January 1994)
A DSC study of 2-mercaptobenzothiazole accelerated sulfur vulcanization
M. H. S. Gradwell and W. J.McGill
3. S.A. Chemical Institute, 32nd Convention, JOHANNESBURG (January 1994)
ZnO crosslinking chemistry of chloroprene rubber
P. E. Mallon, W. J. McGill and D. P. Shillington
4. 6th European Symposium on Thermal Analysis and Calorimetry, GRADO, Italy (September 1994)
The use of DSC in vulcanization studies
W. J. McGill, M. H. S. Gradwell, F. W. H. Kruger and B. Morgan
5. 6th European Symposium on Thermal Analysis and Calorimetry, GRADO, Italy (September 1994)
Interpretation of vulcanization reactions with the TMTD/MBT system using DSC
W. J. McGill, B. Giuliani and M. H. S. Gradwell
6. South African Symposium on Thermal Analysis 6, PRETORIA (May, 1995).
Diverse Uses of Thermal Analysis Techniques in Rubber Research at UPE.
M. H. S. Gradwell
7. 2nd National Conference of the Institute of Materials - Polymer Division, JOHANNESBURG (October, 1995).
Factors Influencing Scorch Time.
M. H. S. Gradwell
8. Institute of Materials National Conference, JOHANNESBURG, (October 1995)
Metal oxide crosslinking of neoprene
D. P. Shillington, P. E. Mallon, W. J. McGill
9. Institute of Materials National Conference, JOHANNESBURG, (October 1995)
Tensile properties of thiuram vulcanizates
W. J. McGill and M. Robinson
10. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
A model compound study of TMTD accelerated vulcanization
W. J. McGill and M. Geyser
11. 36th IUPAC International Symposium on Macromolecules, SEOUL, South Korea (August, 1996).
The t-Butylbenzothiazole Sulfenamide Accelerated Sulfur Vulcanization of Polyisoprene.
M. H. S. Gradwell and M. J. van der Merwe.
12. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
Sulfenamide accelerated sulfur vulcanization of polyisoprene
M. H. S. Gradwell, K. G. Hendrikse, W. J. McGill and M. J. van der Merwe
13. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
Scorch delay in MOR accelerated sulfur vulcanization
K. G. Hendrikse, M. H. S. Gradwell and W. J. McGill
14. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
Co-vulcanization of rubber blends
P. E. Mallon and W. J. McGill
15. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
The effect of MBT on the formation of polysulfides of MBTS
B. Morgan, M. H. S. Gradwell and W. J. McGill
16. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
The formation of polysulfides of vulcanization accelerated DPTS
C. P. Reyneke-Barnard, M. H. S. Gradwell and W. J. McGill
17. S.A. Chemical Institute, 33rd Convention, CAPE TOWN, (January 1996)
The effect of stearic acid on the formation of accelerator polysulfides
S. R. Shelver and W.J. McGill
18. European Symposium on Polymer Blends, MAASTRICHT, Netherlands (May 1996)
Vulcanization of rubber blends and the effect of curative diffusion on properties.
P. E. Mallon and W. J. McGill
19. International Rubber Conference, KUALA LUMPUR, Malaysia (October 1997)
The role of stearic acid in accelerated sulfur vulcanization
W. J. McGill, P. E. Mallon and S. R. Shelver
20. Materials Institute, 3rd National Rubber Conference, DURBAN, (October 1997)
The need for a holistic plan for education and training
W.J. McGill
21. South African Symposium on Thermal Analysis 7, PRETORIA (May 1997).
High Resolution Thermogravimetric Analysis of a Polyurethane/Poly(ethyl methacrylate) Interpenetrating Polymer Network.
M. H. S. Gradwell, D. J. Hourston, T. Pabunruang and M. Reading.
22. 3rd National Rubber Conference of the Institute of Materials, DURBAN (October 1997).
Prevulcanization Inhibition. Best Local Paper Award
M. H. S. Gradwell and N. J. Stephenson
23. 4th International Symposium on Applied Bioinorganic Chemistry including the Carman National Physical Chemistry Conference, CAPE TOWN (April 1997).
A comparison of the computed speciation results for fulvic acid complexation obtained using the MINTEQA2 DOM model and the RANDOM model
C Woolard
24. 4th National Corrosion Conference, PORT ELIZABETH (February 1998).
Vulcanization of Rubber (Invited Lecture).
M. H. S. Gradwell
25. 153rd Technical Meeting, Rubber Division, American Chemical Society, INDIANAPOLIS, United States of America (May 1998).
The 2-t-Butylbenzothiazole Sulfenamide Accelerated Sulfur Vulcanization of Polyisoprene.
M. H. S. Gradwell and M. J. van der Merwe
26. 14th Polymer Network Group International Conference, Polymer Networks 98, TRONDHEIM, Norway (June 1998).
The Effect of Accelerator Systems on the Crystallizability of Vulcanized Rubber Networks.
M. H. S. Gradwell, W. J. McGill and M. J. van der Merwe
27. 7th ICCA & 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
The Role of Dimethyldithiocarbamic Acid in Tetramethylthiuram Disulfide Accelerated Sulfur Vulcanization.
M. Shumane, M. H. S. Gradwell, W. J. McGill and S. R. Shelver
28. 7th ICCA & 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
The Effect of Accelerator Systems on the Crystallizability of Rubber Vulcanizates.
M. J. van der Merwe, M. H. S. Gradwell and W. J. McGill
29. 7th ICCA & 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
The Reinforcement Mechanism of Bis-(3-triethoxysilylpropyl) Tetrasulfide, (TESPT), in Silica Filled Vulcanizates.
L. G. Boretti, M. H. S. Gradwell and W. J. McGill.
30. 7th ICCA & 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
The Tetraethylthiuram Disulfide Accelerated Sulfur Vulcanization of Polyisoprene.
D. Grooff and M. H. S. Gradwell
31. 7th ICCA & 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
The conversion of fly-ash to a zeolite for the possible use in waste water treatment
C.D. Woolard and K. Petrus
32. 7th ICCA & 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
A comparison of silica and a particulate high-silicate content waste material as a reinforcing filler for rubbers
K. Garde, W.J. McGill and C.D. Woolard
33. 7th ICCA and 34th Convention of the South African Chemical Institute, DURBAN (July 1998).
The Vulcanization of Chlorobutyl by ZnO and ZnCl2
K. G. Hendrikse and W. J. McGill
34. Eighth Southern African Symposium on Thermal Analysis, JOHANNESBURG (June 1999).
Thermogravimetry: A Tool for the Quantitative Study of Co-vulcanization
K. G. Hendrikse
35. South African Symposium on Thermal Analysis 8, JOHANNESBURG (June 1999).
A Study of Crystallization in Vulcanizates using Thermal Analysis. Perkin-Elmer Award for best paper
M. H. S. Gradwell, W. J. McGill and M. J. van der Merwe
36. 156th Technical Meeting, Rubber Division, American Chemical Society, ORLANDO, United States of America (September 1999).
The Action of N-(cyclohexylthio)phthalimide as a prevulcanization Inhibitor of 2-Bisbenzothiazole-2,2’-disulfide Accelerated Sulfur Vulcanization.
M. H. S. Gradwell and N. R. Stephenson.
37. 15’th National Rubber Conference, Institute of Materials, South African Section, Polymer Division, DRAKENSBERG, South Africa (October 1999).
The Vulcanization of Chlorobutyl Rubber by TMTD, Sulfur and Zinc Oxide.
K. G. Hendrikse and W. J. McGill.
38. 15’th National Rubber Conference, Institute of Materials, South African Section, Polymer Division, DRAKENSBERG, South Africa (October 1999). Best local paper
Some chemical aspects of the use of TESPT as a filler surface modifier in rubber.
L. G. Boretti, K. Garde, M. H. S. Gradwell, W. J. McGill and C. D. Woolard.
39. Rubber Chem ’99, ANTWERP, Belgium (November 1999).
Current Theories on the Action of Thiuram Disulfide Accelerators.
K. G. Hendrikse.
40. 5’th International Symposium on Environmental Geochemistry, CAPE TOWN, South Africa (April 2000).
The use of zeolites synthesized from fly ash as sorbents for organic waste streams.
C. D. Woolard, J. Strong and C. Erasmus.
41. 12th International Conference on Positron Annihilation (ICPA-12), MUNICH, Germany (August 2000)
Positron Annihilation Lifetime Spectroscopy as a Tool to Study Polyisoprene Vulcanizate Network Structures.
P. E. Mallon, Y. C. Jean, C. M. Huang, H. Chen, R. Zhang and M. H. S. Gradwell.
42. 220th National Meeting of the American Chemical Society, WASHINGTON DC, USA (August 2000).
Polyisoprene Vulcanizate Network Structures.
P. E. Mallon, C. M. Huang, H. Chen, R. Zhang, M. H. S. Gradwell and Y. C. Jean.
43. Plastics in the New Millenium, Plastics Institute of South Africa, JOHANNESBURG, South Africa (May 2000).
Morphology of Dynamically Vulcanized Thermoplastic Elastomers.
K. Garde and M. H. S. Gradwell.
44. Polymer Processing Society, Europe/Africa Regional Meeting 2000, ZLIN, Czech Republic (August 2000).
The Effect of Dynamically Curing Thermoplastic Elastomers in the Internal Mixer.
M. H. S. Gradwell and K. Garde
45. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Polymer Blends – Structural features and Physical Properties
M. H. S. Gradwell, K. Garde, P. E. Mallon, W. J. McGill.
46. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Perceptions of 1st and 2nd year chemistry with regard to concepts of scale: misconceptions, origins and possible solutions.
C. D. Woolard.
47. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Bisbenzothiazole-2-2’disulfide (MBTS) Accelerated Vulcanization of Rubber Model Compounds, 2-Methyl-2-pentene and Squalene.
L. G. Boretti, M. H. S. Gradwell and C. D. Woolard.
48. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
The Characterization of Elastomer Blends by Thermal Analysis Techniques.
K. G. Hendrikse
49. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Covulcanization of Natural Rubber/Chlorobutyl Rubber Blends
K. M. Petrus, W. J. McGill and C. D. Woolard.
50. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Dimethylammonium Dimethyldithiocarbamate Accelerated Sulfur Vuilcanization.
M. Shumane, M. H. S. Gradwell and W. J. McGill.
51. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Detection and Role of Thiols in Vulcanization of 2,3-DimethylBut-2-ene System
M. van der Horst, K. G. Hendrikse and C. D. Woolard.
52. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
Derivatization Technique for the Detection of Thiols (With Special Emphasis on the Damping of Induced Noise).
C. D. Woolard, K. G. Hendrikse and M. van der Horst.
53. 35th Convention of the South African Chemical Institute, POTCHESTROOM, South Africa (September 2000).
The Morphology of Dynamically Vulcanized Thermoplastic Elastomers.
K. Garde and M. H. S. Gradwell.
54. 28th NATAS Annual Conference on Thermal Analysis and Applications, ORLANDO, USA (October 2000). North American Thermal Analysis Society.
Determination of Bound rubber and Filler Distribution in Elastomer Blends by Thermogravimetric Analysis.
C. D. Woolard and B. J. McFadzean
55. Microscopy Society of Southern Africa, Annual Conference, GRAHAMSTOWN, South Africa (December 2000).
The Morphology of Dynamically Vulcanized Thermoplastic Elastomers
K. Garde and M. H. S. Gradwell
56. 9th South African Symposium on Thermal Analysis, PRETORIA, South Africa (October 2001).
The determination of vapour pressures by TGA
C Woolard
57. 9th South African Symposium on Thermal Analysis, PRETORIA, South Africa (October 2001).
R Bosch and C Woolard
The use of TG analysis to determine bound rubber in blend systems
58. 9th South African Symposium on Thermal Analysis, PRETORIA, South Africa (October 2001). – Won best poster award
K Garde and C Woolard
A study of the effect of rubber and curatives on the network of low density polyethylene in a thermoplastic elastomer blend
59. 16th National Rubber Conference, Institute of Materials, DRAKENSBERG, South Africa (March 2002)
C Woolard, J Lourens and L Boretti
The mechanism of pre-vulcanization inhibition as illustrated by CTP inhibition of MBTS accelerated sulfur vulcanization of polyisoprene
16th National Rubber Conference, Institute of Materials, DRAKENSBERG, South Africa (March 2002)
60. H Desai, K Hendrikse and C Woolard
Investigations into the mechanism of ethylene thiourea (ETU) Crosslinking of polychloroprene (CR)
16th National Rubber Conference, Institute of Materials, DRAKENSBERG, South Africa (March 2002)
61. M van der Horst, WJ McGill and CD Woolard
Network structure and its relation to tensile properties
16th National Rubber Conference, Institute of Materials, DRAKENSBERG, South Africa (March 2002)
R Bosch and C Woolard
Estimating bound rubber in rubber blends – the affinity of silica for NR over SBR
62. 16th National Rubber Conference, Institute of Materials, DRAKENSBERG, South Africa (March 2002)
K Petrus and C Woolard
The action of diphenylguanidine (DPG) as primary accelerator of sulfur vulcanisation and as a secondary accelerator in combination with bis(2-mercaptobenzothiazole)disulfide
63. 161st Technical Meeting of the Rubber Division, American Chemical Society, Savannah, Georgia, May 2002
K Garde and C Woolard
A study of the effect of rubber curatives on low density polyethylene in a thermoplastic elastomer blend
64. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
C Woolard and L Boretti
Size exclusion chromatography (SEC), an often overlooked tool in the mechanistic studies of polymeric systems
65. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
K Garde and CD Woolard
The effect of rubber curatives on the network of low density polyethylene in a thermoplastic elastomer blend
66. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
M.R. Caira, L.R. Nassimbeni and A. Jacobs
Structure and reactivity of selected organic inclusion compounds
67. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
Susan A Bourne, Ayesha Jacobs, Mairi Kilkenny
Solid-state reactions in inclusion chemistry
68. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
M. van der Horst, W.J. McGill and C.D. Woolard
Nuclear Magnetic Resonance response to network structure and crosslink density of vulcanizates
69. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
Keith Petrus and Chris Woolard
Diphenylguanidine (DPG) as an activator of Bisbenzothiazole-2,2’-disulfide (MBTS) accelerated sulfur vulcanization of polyisoprene (IR)
70. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
Robert Bosch and Chris Woolard
Bound rubber analysis of blend systems – the effect of composition and mixing regime
71. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
Hassen Desai, Kevin Hendrikse, and Chris Woolard
Investigations into the mechanism of ethylene thiourea (ETU) crosslinking of polychloroprene (CR)
72. 36th Convention of the South African Chemical Institute, Port Elizabeth, July 2002
Jason van Rooyen, Ayesha Jacobs and Chris Woolard
The role of thiocarbamic acids as vulcanization accelerators – their synthesis
73. 6th Annual UNESCO/IUPAC Conference on Polymer Properties, April 2003
K Petrus and C Woolard
The mechanism of cure activation by amines in the presence of primary vulcanisation accelerators
74. 6th Annual UNESCO/IUPAC Conference on Polymer Properties April 2003
K Garde and C Woolard
The effect of curative type and crosslink density on the properties of polyisoprene/polyethylene blends
75. 6th Annual UNESCO/IUPAC Conference on Polymer Properties April 2003
M van der Horst, WJ McGill and CD Woolard
Variable temperature physical property measurements of vulcanizates: Understanding elastomer failure
76. K Garde and C Woolard
The effect of curative type and crosslink density on the properties of polyisoprene/polyethylene blends
Euromat 2003, Lausanne, Switzerland
77. K Garde and C Woolard
The relationship between curing system and the properties of polyethylene/polyisoprene thermoelastic elastomer blends
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
78. R Bosch and C Woolard
The prediction of the ultimate properties of polymer blends: The use of the Takayanagi model to filled elastomer blends
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
79. C Woolard, M van der Horst and WJ McGill
The effect of temperature on the ultimate properties of polymers – towards a new understanding of polymer failure and in particular rubber elasticity
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
80. H Desai, K Hendrikse and CD Woolard
The mechanism of ethylene thiourea vulcanization of polychloroprene
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
won best poster award
81. K Petrus and C Woolard
Synergistic effects in rubber vulcanization: acceleration by MBTS/amine systems
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
82. G Saunders, WJ McGill and CD Woolard
Factors affecting the ultimate properties of filled rubber vulcanizates
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
83. J van Rooyen and C Woolard
Quantitative structure activity relationships of some thiuram disulfides
10th South African Symposium on Thermal Analysis, Port Elizabeth, September 2003
84. R Bosch and C Woolard
The morphology of styrene butadiene and natural rubber blends
Microscopy Society of Southern Africa, Cape Town, December 2003
85. C. Woolard and L. Boretti
Vulcanization studies using modulated temperature DSC
TA Users’ Group Meeting, San Antonio, Texas, February 2004
86. H Oosthuizen and C Woolard
Thermal and oxidative stability of PPV-based light emitting polymers
Conference on photo-responsive materials, Kariega, February 2004
87. C Woolard, W McGill, L Boretti and M van der Horst
The relationship between accelerator structure, reactivity and final physical properties of rubber vulcanizates
37th Convention of the South African Chemical Institute, Pretoria, July 2004
88. H Oosthuizen, K Garde and C Woolard
The synthesis of novel light emitting polymers
37th Convention of the South African Chemical Institute, Pretoria, July 2004
89. K Garde and C Woolard
The Role of Elastomer and Curatives in Polyethylene/Polyisoprene Thermoplastic Elastomers
28th NATAS annual conference on thermal analysis and applications, Williamsburg, October 2004
90. C. Woolard
Reversion
17th National Rubber Conference, Institute of Materials, Mablingwe, March 2005
Won best local paper award
91. J van Rooyen and C. Woolard
The prediction of the reactivity of thiuram disulfides using linear free energy relationships
17th National Rubber Conference, Institute of Materials, Mablingwe, March 2005
92. R Bosch, K Garde and C. Woolard
Novel nano composites of ZnO and rubber
17th National Rubber Conference, Institute of Materials, Mablingwe, March 2005
93. K Hendrikse, H Desai and C Woolard
Vulcanization of polychloroprene by ethylene thiourea (ETU) and ZnO
18th National Rubber Conference, Institute of Materials, Minerals and Mining, Fish River, April 2007
94. R. Bosch and C. Woolard
Novel nano zinc oxide activators and the quest for zinc-less rubber
18th National Rubber Conference, Institute of Materials, Minerals and Mining, Fish River, April 2007
95. S Hlangothi and C Woolard
The influence of cyclic disulfide vulcanization systems on isogrip (3,4-polyisoprene)
11th UNESCO/IUPAC Macromolecular Conference, , Berg-en-Dal, 2008
96. C Woolard
Three Princes of Serendib – Factors influencing research and innovation in the polymer industry
19th National Rubber Conference, Institute of Materials, Minerals and Mining, Howick, March 2009
97. A Boyce, SP Hlangothi and C Woolard
Unbaking the cake – The devulcanization of model compounds by a variety od diphenyldisulfides
UNESCO/IUPAC Workshop & Conference on Macromolecules & Materials, Port Elizabeth, SA, Sept 2015
98. S von Berg, SP Hlangothi and C Woolard
Characterization and formulation development of novel tyre de-vulcanizate
UNESCO/IUPAC Workshop & Conference on Macromolecules & Materials, Port Elizabeth, SA, Sept 2015
99. K Nare and C Woolard
The use of rubber crumb as an adsorbent for organic waste
UNESCO/IUPAC Workshop & Conference on Macromolecules & Materials,, Port Elizabeth, SA, Sept 2015
100. C Woolard, S von Berg and SP Hlangothi
Thermal analysis as a characterisation tool for waste rubber crumb and recycled rubber
ThermSA – Applications in Thermal Analysis Stellenbosch, Sept 2015
General Scientific Papers and Addresses
1. South African Chemical Institute, SASOL Silver Medal Address, Port Elizabeth, 1994.
Accelerated Sulfur Vulcanization of Polyisoprene by Benzothiazole Derivatives
M. H. S. Gradwell
2. Eastern Cape Section of the Institute of Materials, Polymer Division, 1994.
Current and Future Research at UPE Polymer Chemistry.
K. G. Hendrikse
3. Institute of Materials, One Day Symposium, Opening Address, Port Elizabeth, 1994
W. J. McGill
4. Eastern Cape Section of the Institute of Materials, Polymer Division, 1996
An overview of Research by the UPE Polymer Chemistry Research Group.
K. G. Hendrikse and B. Morgan
5. Colloquium – Gorlaeus Laboratories, Leiden University, The Netherlands, 1997
Factors Influencing Scorch Time
M. H. S. Gradwell
6. Institute of Materials, William Sage Medal Address, Port Elizabeth, 1997.
Academia and Industry
W. J. McGill
7. South African Chemical Institute, Gold Medal Address, Port Elizabeth, 1999.
Developments of Rubber Research at UPE
W. J. McGill
8. University of Missouri, Kansas City, Missouri, September 1999.
Vulcan’s Progeny – The Analysis of Vulcanizate Network Structures.
M. H. S. Gradwell
9. Institute of Materials, Education Evening, Port Elizabeth, September 2001
Fire and Brimstone, Highlights of recent studies into vulcanization mechanisms at UPE
H. Desai
10. Institute of Materials, Port Elizabeth, June 2002
Premature vulcanization and the need for delay
Christopher Woolard
11. Institute of Materials, Education Evening, Port Elizabeth, August 2002
Aspects of filler reinforcement in rubber blends
Robert Bosch
12. SACI E Cape post-graduate seminars, Grahamstown, October 2002
The application of thermogravimetry to the study of filler reinforcement in rubber blends
Robert Bosch
13. Christopher Woolard
Gas – an analysis of chemical weapons and the chemical weapons convention
SACI E Cape Region, Port Elizabeth, April 2003
14. IOM E Cape Education evening, August 2003
Ultimate properties of rubber vulcanizates: why they fail when they do
M van der Horst
15. R. Bosch
The use of Takayanagi models to predict polymer ultimate properties
SACI E Cape post-graduate seminars, October 2003
won best presentation
16. Kathy Garde and Christopher Woolard
Thermoplastic Elastomer Blends: The Role of Curatives and Elastomer
IOM3 Eastern Cape Section, June 2004
17. H Oosthuizen
Antioxidants, doing more than you think
IOM3 E Cape Education evening, August 2004
18. J van Rooyen
The developments of new accelerators and activators for the rubber industry
IOM3 E Cape Education evening, August 2005
19. C. Woolard
French letters, flat tyres and fuel
IOM3, William Sage Medal Address, Johannesburg, 2012
20. S. von Berg
IOM3 E Cape Education evening, September 2014
21. A Boyce
Unbaking the cake – The devulcanization of model compounds by a variety od diphenyldisulfides
IOM3 E Cape Education evening, September 2015
Other publications
1. Kathy Garde and Chris Woolard
The use of nitrogen in car tyres
Bounce, vol 1, (2004) 18
Awards
1. W.J. McGill
William Sage Medal, awarded for contributions to polymer industry, research or education in South Africa, Institute of Materials (Southern Africa Region)
1997
2. M.H.S. Gradwell
Raikes Medal, made to a member of the Institute, under the age of 40 on 31 December in the year of the award, whose original chemical research shows outstanding promise, as adjudged by publications in reputable journals, South African Chemical Institute
1998
3. W.J. McGill
Gold Medal, made to a member of the Institute in good standing, whose scientific contributions in the field of chemistry or chemical technology are adjudged to be of outstanding merit, South African Chemical Institute
1999
4. C. Woolard
William Sage Medal, awarded for contributions to polymer industry, research or education in South Africa, Institute of Materials, Minerals and Mining (Southern Africa Region)
2012