Dielectric relaxation spectra of poled polyvinylidene fluoride

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Abstract
The dielectric relaxation spectra of Form 2 PVF2 have been measured in the frequency range 10−5Hz to 105Hz from 40°C to 120°C before and after corona charging to an applied field of 3×108Vm−1. An observed reduction in the αc relaxation amplitude after corona charging may be explained by a change in the dipole moment component along the polymer chain in the polar variation of the Form 2 PVF2. A low frequency relaxation, with an activation energy of 1.3eV, has been found in the uncharged sample, which may not be clearly observed after charging, and this relaxation may be due to an interfacial polarization.