Pyroelectric properties and dielectric hysteresis of a poly(vinyl alcohol) with azobenzene-alkoxy side chains

被引：26

作者：

Frübing, P ^{[1
]}

Wegener, M ^{[1
]}

Gerhard-Multhaupt, R ^{[1
]}

Buchsteiner, A ^{[1
]}

Neumann, W ^{[1
]}

Brehmer, L ^{[1
]}

机构：

[1] Univ Potsdam, Dept Phys, D-14469 Potsdam, Germany

来源：

POLYMER | 1999年 / 40卷 / 12期

关键词：

poly(vinyl alcohol); azobenzene group; side-chain polymer;

D O I：

10.1016/S0032-3861(98)00563-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

After thermal poling, pyroelectricity and a pronounced dielectric hysteresis have been observed on films of a poly(vinyl alcohol) with azobenzene-alkoxy side chains (A2-PVA). Based on dielectric spectroscopy data and structural information from differential thermal analysis, the pyroelectricity can be explained with reversible dipole-density changes during thermal expansion, whereas the dielectric hysteresis is proposed to result from the polarisation caused by charge carriers, probably ions. These findings are also significant for the interpretation of dielectric hysteresis measurements on other polymer-electret materials. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：3413 / 3420

页数：8

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