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N. Narsing Das, Y. Dasaradhudu, V.V.R. Narasimha Rao

Pyroelectricity of polyvinylformal film (in English)

Polimery 1993, No 2, 67

DOI: dx.doi.org/10.14314/polimery.1993.067


The pyroelectric behaviour of polyvinylformal films was studied in a vacuum of 10'3 torr in various conditions of polarizing field, temperature and time and heating rates. The pyroelectric coefficient exhibited abnormal behavior starting initially on the negative side and then changing sign from negative to positive. Negative pyroelectric coefficients are believed to be due to dipolar orientation, whereas space charge polarization is responsible for positive pyroelectric coefficients.

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