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Aging of SBR
Author(s) -
Bevilacqua E. M.,
Wenisch W. J.
Publication year - 1965
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.1965.070090124
Subject(s) - vulcanization , chain scission , sulfur , hydrocarbon , bond cleavage , oxygen , chemistry , accelerated aging , polymer chemistry , chemical engineering , materials science , natural rubber , organic chemistry , composite material , polymer , catalysis , engineering
Changes in properties of vulcanized SBR during aging at 130°C. in air are the result of reactions involving both the hydrocarbon and the crosslinks. Hydrocarbon oxidation is related to the overall rate of oxidation; it leads to both scission and crosslinking. Sulfur crosslinks are broken and new crosslinks formed in reactions which are affected by oxygen but relatively independent of the overall rate of oxidation. The excess of crosslinking over scission decreases progressively with increasing cure.