New Types of Premature Vulcanization Inhibitors

Autor:	R. J. Hopper
Rok vydání:	1974
Předmět:	endocrine system Polymers and Plastics Chemistry Leaving group Vulcanization Retarder Photochemistry Decomposition law.invention Nucleophile law Materials Chemistry Organic chemistry Molecule
Zdroj:	Rubber Chemistry and Technology. 47:79-87
ISSN:	1943-4804 0035-9475
DOI:	10.5254/1.3540433
Popis:	The activity of the thiosulfonamides and dithiotrichloromethanes as retarders is apparently a result of their ability to function as BTSH trapping agents. The effect of substituents on retarder efficiencies seems consistent with a mechanism involving a three-way competition between crosslinking, retardation, and decomposition of retarder to non-functional products. The key reaction responsible for trapping BTSH probably involves a nucleophilic displacement. Substituents which favor this type of displacement increase efficiency when they are on the portion of the retarder molecule which combines with BTSH; when they are on the portion which becomes the leaving group, they evidently promote decomposition, causing a net decrease in retarder efficiency.
Databáze:	OpenAIRE
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