Effect of Heat Treatment on Dielectric Properties of Polyvinylidene-Vinylchloride Copolymers

Abstract

The dielectric properties of polyvinylidene-vinylchloride copolymers (VD-VC copolymers), heat treated at 95, 130 and 145°C, were studied. In the case of VD-VC copolymer, we observed one dispersion. The degree of crystallinity was raised with increasing heat-treating temperature. The magnitude of the dielectric dispersion was decreased with increasing the degree of crystallinity. It may be concluded that the dispersion is due to the polar groups in the amorphous region. The value of Cole-Cole's parameter a of VD-VC copolymer was decreased with temperature and no change was observed by heat-treatment of the specimens.