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Resistance to ozone cracking in elastomer blends
Author(s) -
Andrews E. H.
Publication year - 1966
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.1966.070100103
Subject(s) - materials science , ozone , inert , natural rubber , cracking , elastomer , composite material , phase (matter) , chemistry , organic chemistry
The phenomenon of ozone cracking has been investigated for elastomer blends containing an ozone‐reactive phase (natural rubber) and an ozone‐inert phase (ethylene–propylene rubber). Electron microscopical studies reveal phase separation in the blend and the locus of ozone attack. Ozone cracks traverse the reactive phase and occasionally jump across inert particles without severing them. This mechanism provides the basis of a theory which correctly predicts the dependence of both the critical stored energy for ozone cracking and the crack density upon the blend composition.