A MOLECULAR MECHANICS STUDY ON CONFORMATIONS OF PIEZOELECTRIC COPOLYMERS OF VINYLIDENE CYANIDE

被引：10

作者：

INOUE, Y

MARUYAMA, Y

SAKURAI, M

CHUJO, R

机构：

[1] Department of Biomolecular Engineering, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152

来源：

POLYMER | 1990年 / 31卷 / 05期

关键词：

conformation; molecular mechanics; piezoelectricity; poly(vinylidene cyanide-co-methyl methacrylate); poly(vinylidene cyanide-co-vinyl acetate);

D O I：

10.1016/0032-3861(90)90046-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A molecular mechanics calculation has been applied to investigate conformational characteristics of highly alternating copolymers of vinylidene cyanide with vinyl acetate and methyl methacrylate. The former shows high piezoelectricity, while the latter has quite low piezoelectricity. It was found that the main-chain conformations depend on the configurations of the main chain as well as the conformations of the side chains. Both copolymers were found to take trans-rich conformations around the C(CN)2CH2 bond. The vinyl acetate copolymer takes predominantly the trans conformation around the CH2CH(OCOCH3) bond. The methyl methacrylate copolymer also takes the trans-rich conformation around the CH2C(COOCH3)(CH3) bond, but the fraction of trans conformer is not larger than that around the corresponding bond in the vinyl acetate copolymer. It was suggested that the main-chain conformation of vinylidene cyanide copolymers before drawing/poling treatments is one possible important factor determining the piezoelectric activity of these copolymers. © 1990.

引用

页码：850 / 856

页数：7

共 11 条

[1] CONFORMATIONAL-ANALYSIS .130. MM2 - HYDROCARBON FORCE-FIELD UTILIZING V1 AND V2 TORSIONAL TERMS [J].