The effect of corona charging (at 12.5 kV) of polyvinylidine fluoride (PVF2) is studied by infrared spectroscopy and X-ray diffraction techniques. The results show that changes in molecular conformation occur with such a poling process that is in agreement with Southgate. The pyroelectric coefficient was observed to increase significantly after such a poling, reaching a maximum value of ~3 nC/cm2K at ~343 K. It is suggested that the pyroelectricity in PVF2 at this temperature is due to dipolar orientation.
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Das‐Gupta et al. (1978) studied this question.
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