Strain rate and temperature dependence of shear properties of epoxy resin with various molecular weight between cross-linkings

摘要

Epoxy resins with various molecular weightsbetween cross-linkings were prepared. In order to examine thestrain rate and temperature dependence of the shear yield strengthand the shear strength, test specimens were subjected to sheardeformation at various strain rates and temperatures. The shearyield strength and the shear strength increased almost linearly asthe logarithm of the strain rate increased. The strain rate-temperature superposition held for these shear properties. Inparticular, an experimental equation of the strain rate-temperaturesuperposition for the shear yeild strength was found. The shiftfactor to obtain a master curve was given with the temperaturedependence of an Arrhenius type. Furthermore, the strain rate-temperature-molecular weight between cross-linkingssuperposition held for the shear properties.