N,N′-Pentamethylenethiuram disulfide and N,N′-pentamethylenethiuram hexasulfide accelerated sulfur vulcanization. IV. Vulcanization of polyisoprene and 2,3-dimethyl-2-butene in the presence of ZNO
✍ Scribed by C. P. Reyneke-Barnard; M. H. S. Gradwell; W. J. McGill
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 190 KB
- Volume
- 78
- Category
- Article
- ISSN
- 0021-8995
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The thermal stability of N,NЈ-dipentamethylenethiuram disulfide (CPTD) and tetramethylthiuram disulfide (TMTD) with respect to thiourea formation was compared. CPTD is stable at 120°C but decomposes to N,NЈ-dipentamethylenethiourea (CPTU) at vulcanization temperatures (140°C), while TMTD is stable t
Polyisoprene was vulcanized with binary accelerator systems comprising mixtures of the zinc salts of tetramethylthiuram disulfide (TMTD) and 2-mercaptobenzothiale (MBT). Samples were heated in a DSC at a programmed rate, the reaction was stopped at points along the thermal curve, and the system was