Abstract
A broad experimental programme using Dynamical–Mechanical Thermal Analysis (DMTA) was carried out on ethylene/propylene block copolymers (EPBC). The samples were subjected to frequency scans to evaluate the dependence of stored modulus on frequency. Tests were conducted on similar samples using different loading modes such as single cantilever, dual cantilever and tension configurations. If the stored modulus is plotted versus the test frequency, a different trend corresponding to each loading mode is obtained. Similar conclusions can be drawn regarding the glass transition temperature. In this work, strain rate, instead of frequency, is used to compare results provided by different loading modes. If the strain rate is used as the reference variable, a unique trend is observed despite the loading modes used to perform the experiment.
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