Abstract
Annealed and stretched films of P(AN-MA) were charged with negatively constant voltage corona at different temperatures. Electric fields induce a phase transition which is determined by wide angle X-ray diffraction. Using the thermally stimulated depolarisation technique, pyroelectric currents have been investigated in unpolarised and corona charged P(AN-MA) films over the temperature range 25–140°C. Stretching films produces an enhancement in pyroelectricity. The increase in crystallinity and the presence of space charge build-up during corona charging are believed to be the chief contributors to the higher pyroelectric activity in the stretched films.
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