Electrochemical induced ductile-brittle transition in tosylate-doped (pTS) polypyrrole

被引：30

作者：

Murray, P

Spinks, GM

Wallace, GG

Burford, RP

机构：

[1] Univ Wollongong, Intelligent Polymer Res Lab, Wollongong, NSW 2522, Australia

[2] Univ New S Wales, Dept Polymer Sci, Sydney, NSW 2502, Australia

来源：

SYNTHETIC METALS | 1998年 / 97卷 / 02期

关键词：

polypyrrole; mechanical properties; applied potential; electrolyte;

D O I：

10.1016/S0379-6779(98)00119-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A transition from a ductile to brittle behaviour has been observed in tosylate-doped polypyrrole resulting from reduction and oxidation of the polymer. The electrochemical potential at which the transition occurred was found to depend upon the electrolyte used, with sodium nitrate and sodium chloride undergoing reduction at higher potentials than occurred with magnesium nitrate and magnesium chloride. The ductile-brittle transition observed was found to be due to the formation of ionic crosslinking during oxidation, and their removal during reduction. The plasticization expected from the concomitant incorporation and expulsion of ionic species (with considerable water of hydration) was found to have a smaller effect. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：117 / 121

页数：5

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