Corona charging and the piezoelectric effect in polyvinylidene fluoride

Abstract
Biaxially stretched PVF2 films were poled by corona charging over a range of surface potentials not exceeding 10 kV. Studies of x‐ray diffraction patterns are presented together with the measured values of the piezoelectric constant d31 of such films. The results indicate that the piezoelectricity in this polymer arises from the dipolar orientation of the polar crystallites.