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Effect of γ-radiation on the dynamic mechanical properties of styrene–butadiene rubbers

✍ Scribed by R. K. Traeger; T. T. Castonguay

Publisher
John Wiley and Sons
Year
1966
Tongue
English
Weight
717 KB
Volume
10
Category
Article
ISSN
0021-8995

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✦ Synopsis

Three different styrene-butadiene, gum rubbers were exposed to ?-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 driring 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.

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The dynamic mechanical response of several binary mixtures of a styrene±butadiene copolymer and high cis-polybutadiene has been studied. The loss tangent and shear modulus were measured with a free damping torsion pendulum at temperatures between 143 and 343 K in argon atmosphere. From the loss tang