Abstract
The infra-low frequency elastic modulus and the complex dielectric permittivity of vinylidene fluoride trifluoroethylene VDF70/Tr30, are studied within the temperature range of 20 ÷ 140 °C. The experimental results are used to determine the temperature dependence of order parameter η near the Curie temperature (T c). It is revealed that spontaneous polarization P s and spontaneous strain xs are linearly coupled. The dielectric dispersion, due to the relaxation dynamics of polar microregions in the vicinity of the T c, is found. The average relaxation time follows the Arrhenius law with activation energy depending on temperature.
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