Abstract
An epoxide resin was tested in tension between 77°K and 380°K at a strain rate of 3.3 × 10 −4 sec −1. Besides the usual mechanical characteristics, activation parameters, as determined in strain-rate change tests, are presented. Their dependence on temperature, stress and strain in demonstrated. Three different rate-controlling deformation mechanisms with total activation enthalpiees of ΔH 0 I < 1 eV, ΔH 0 II = 2–3 eV and ΔH 0 III > 4 eV are believed to operate, each in a distinct temperature region.
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