Composition Dependence of Microstructures and Ferroelectric Properties in Poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorodifluoroethylene) Terpolymers

• DOI: 10.1021/acs.macromol.0c00370
• Publication Date: 2020-04-09T19:41:49Z
• Authors: Wenhan Xu; Zhubing Han; Yang Liu; Xin Chen; He Li; Lulu Ren; Qiming Zhang; Qing Wang
• Keywords: Hysteresis; Ferroelectric Polymers; Polyvinylidene fluoride

A family of poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorodifluoroethylene) [P(VDF-TrFE-CDFE)] terpolymers was synthesized. The effect the chlorodifluoroethylene (CDFE) concentration on microstructures and ferroelectric properties terpolymer has been systematically investigated. It is found that P(VDF-TrFE-CDFE) can be gradually converted from a normal into relaxor with increase CDFE content 0.7 to 4.5 mol %. Fourier-transform infrared spectroscopy wide-angle X-ray diffraction reveal incorporated crystalline region breaks up large domains nanoregions by stabilizing gauche conformation. As result, eliminates energy barrier ferroelectric–paraelectric transition leads behavior at high contents CDFE, including diffuse dielectric peaks, constants (e.g. K = 30@room temperature), slim polarization hysteresis loops. This work identifies new structure provides insights role chlorinated comonomers in polyvinylidene fluoride-based polymers.