INVESTIGATION OF SWITCHING CHARACTERISTICS OF VINYLIDENE FLUORIDE/TRIFLUOROETHYLENE COPOLYMERS IN RELATION TO THEIR STRUCTURES.

被引：0

作者：

Tajitsu, Yoshiro ^{[1
]}

Ogura, Hiroshi ^{[1
]}

Chiba, Akio ^{[1
]}

Furukawa, Takeo ^{[1
]}

机构：

[1] Waseda Univ, Saitama, Jpn, Waseda Univ, Saitama, Jpn

来源：

Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes | 1987年 / 26卷 / 04期

关键词：

FERROELECTRIC MATERIALS - Switching - FLUORINE CONTAINING POLYMERS - Switching;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Ferroelectric switching characteristics of VDF/TrFE copolymers have been investigated over the entire range of composition for the samples subjected to drawing and/or annealing. Switching phenomena were most remarkably observed in the copolymers containing 50-80 mol% VDF. The as-cast copolymer exhibits no switching behavior because of high a depolarization field associated with low crystallinity. Draw-induced orientation of the chain axis parallel to the film surface causes an increase in the amount of reversed polarization. Annealing at a temperature between the Curie point and the melting point results in a significant increase in the degree of crystallinity and the amount of reversed polarization. Extrapolating to 100% crystallinity allows an estimation of spontaneous polarization.

引用

页码：554 / 560