The pressure dependence of the pyroelectric response of poly (vinylidene fluoride) films

Abstract

The pressure dependence of the pyroelectric coefficient Py was determined from atmospheric pressure to 7 kbar over a temperature range from −80 to +48 °C for poled uniaxially oriented poly (vinylidene fluoride) film. The effect of the glass transition on Py as a function of pressure is compared to the pressure dependence of the glass-transition temperature obtained from dielectric studies. The ratio of dp, the hydrostatic pressure piezoelectric coefficient, to Py is presented as a function of both temperature and pressure. The details of a high-pressure system design for these measurements are also presented.