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Effect of γ‐radiation on the dynamic mechanical properties of styrene–butadiene rubbers
Author(s) -
Traeger R. K.,
Castonguay T. T.
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.1966.070100313
Subject(s) - styrene butadiene , materials science , dissipation factor , dynamic mechanical analysis , composite material , radiation , dynamic modulus , modulus , natural rubber , irradiation , relaxation (psychology) , styrene , polymer , copolymer , optics , dielectric , psychology , social psychology , physics , optoelectronics , nuclear physics
Three different styrene–butadiene, gum rubbers were exposed to γ‐radiation doses ranging from 0 to 200 Mrad. The crosslink densities, hardness, and the dynamic mechanical properties were evaluated. All specimens increased in hardness and crosslink density during radiation. This was reflected in an increased storage modulus, broadened loss tangent maximum, and increased relaxation spectrum. The dynamic data are presented in master curves which were developed by using the WLF equation.