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Oxidative aging of natural rubber vulcanizates. Part II. Effect of vulcanizate structure

✍ Scribed by C. L. M. Bell; J. I. Cunneen

Publisher
John Wiley and Sons
Year
1967
Tongue
English
Weight
618 KB
Volume
11
Category
Article
ISSN
0021-8995

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✦ Synopsis

The oxidation characteristics of protected and unprotected vulcanizates from natural rubber have been examined. With unpurified rubber (RSS1) in the presence or absenee of added antioxidants the rate of oxidation of the VulCSnizates is: rmaccelerakd sulfur > accelerated sulfur > TMTD sulfurless or EV > peroxide. This wdez 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.

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✍ C. L. M. Bell; R. Tiller πŸ“‚ Article πŸ“… 1967 πŸ› John Wiley and Sons 🌐 English βš– 415 KB πŸ‘ 2 views

A new method has been developed for measuring the number of molecules of oxygen required ( 6 ) to cause a main chain scission in peroxide vulcanisates of natural rubber. This method is based on experimentally derived relationships and is not dependent on statistical theories of rubber elasticity. Th