EFFECT OF HYDROSTATIC-PRESSURE ON DIELECTRIC BEHAVIOR AND PHASE-TRANSITION IN FERROELECTRIC POLYMERS

effect of hydrostatic pressure on the dielectric behavior of ferroelec tric copolymers of vinylidene fluoride and trifluoroethylene is discus sed to elucidate the roles of interm olecular and intramolecular inter actions in a ferroelectric- paraelectric phase transition of the polym ers. The phase transition temperature and temperature hysteresis of th e phase transition are influenced by the hydrostatic pressure. It is c oncluded that these effects of hydrostatic pressure result from its se lective working on the intermolecular interaction.