Premium
Oxidative aging of natural rubber vulcanizates. Part I. The scission of peroxide vulcanizates
Author(s) -
Bell C. L. M.,
Tiller R.
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.1967.070110725
Subject(s) - chain scission , peroxide , natural rubber , bond cleavage , antioxidant , materials science , elasticity (physics) , oxygen , polymer chemistry , molecule , organic peroxide , chemistry , composite material , organic chemistry , catalysis , polymer , copolymer
A new method has been developed for measuring the number of molecules of oxygen required (ϵ) to cause a main chain scission in peroxide vulcanizates of natural rubber. This method is based on experimentally derived relationships and is not dependent on statistical theories of rubber elasticity. The value ϵ is only slightly temperature dependent, ranging from 28 at 65°C. to 22 at 100°C. The effects of several types of antioxidant have been examined, in all cases ϵ was greatly reduced. The effect of antioxidant 2246 has been studied in more detail and the results indicate that there is a high probability of scission occurring at the termination step in the oxidation chain.