Ferroelectricity of poly(vinylidene fluoride): Transition temperature

Temperature dependence of polarization of poly(vinylidene fluoride) (PVF2) has been measured under ac fields of 100-400 kV/cm at 50 Hz at temperatures ranging from 22 to 150 °C. It is found that PVF2 is a ferroelectric with its transition temperature at ∼ 140 °C. Above this temperature, which is about 30 °C below the melting point, no remnant polarization can be measured. © 1980 The American Physical Society.