Electrical properties of polypyrrole doped with β-naphthalenesulfonic acid and polypyrrole-polymethyl methacrylate blends

被引：50

作者：

Dutta, P ^{[1
]}

De, SK ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, W Bengal, India

来源：

SYNTHETIC METALS | 2003年 / 139卷 / 02期

关键词：

polymethyl methacrylate; beta-naphthalenesulfonicacid; electron tunneling; polaron tunneling; VRH;

D O I：

10.1016/S0379-6779(03)00018-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrical conductivity both dc and ac of polypyrrole doped with beta-naphthalenesulfonicacid (NSA) and polypyrrole-polymethyl methacrylate blends have been investigated in the temperature range of 300-80 K and in the frequency range of 100-10 MHz. Samples are prepared by in situ polymerisation technique using the common solvent meta cresol. The frequency dependence of conductivity satisfies the power law, sigma(omega) alpha omega(s), with s = 0.73-0.95. In PPY-NSA, s is independent of temperature and explained by electron tunneling model whereas in PPY(NSA)-PMMA blend s decreases with temperature and the ac mechanism is predicted by the overlapping polaron tunneling. The ac conductivity sigma(omega) as a function of temperature follows the scaling law, sigma(omega)/sigma(0) = 1 + (omega/omega(0))" with n similar or equal to 0.85. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：201 / 206

页数：6

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