Piezoelectricity in vinylidene-fluoride-trifluoroethylene copolymer

Abstract

Abstract In this paper, we report a new piezoelectric polymer, vinylidene-fluoride (VDF)-trifluoroethylene (TrFE) copolymer, polarized at high electric fields. The strong piezoelectric effects were observed nat only in uniaxially stretched film, but in melt-crystallized film. In particular, the value of piezoelectric strain constant (d31) of uniaxially stretched film is about 35 × 10−12 C/N, one of the largest values ever reported for piezoelectric polymer. Even the melt-crystallized film show the same as the value of stretched PVDF film.