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Oxidative aging of natural rubber vulcanizates. Part II. Effect of vulcanizate structure
Author(s) -
Bell C. L. M.,
Cunneen J. I.
Publication year - 1967
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1967.070111110
Subject(s) - natural rubber , sulfur , vulcanization , peroxide , antagonism , oxidative phosphorylation , materials science , polymer chemistry , chemistry , composite material , organic chemistry , biochemistry , receptor
The oxidation characteristics of protected and unprotected vulcanizates from natural rubber have been examined. With unpurified rubber (RSS1) in the presence or absence of added antioxidants the rate of oxidation of the vulcanizates is: unaccelerated sulfur > accelerated sulfur > TMTD sulfurless or EV > peroxide. This order is obtained because the sulfur compounds present in the sulfurated vulcanizates are antagonistic towards both natural and added antioxidants. The antagonism is greatest with polysulfides, and when they are present they dominate the aging behavior of vulcanizates.