Issue 13, 2011
From the journal:

Journal of Materials Chemistry

The influence of compression pressure on transport properties of polyaniline

Jan Prokeš,*a   Martin Varga,a   Ivo Křivka,a   Alexandra Rudajevováa  and  Jaroslav Stejskalb  

* Corresponding authors

a Charles University Prague, Faculty of Mathematics and Physics, V Holešovičkách 2, Prague 8, Czech Republic
E-mail: jan.prokes@mff.cuni.cz

b Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague 6, Czech Republic

Abstract

The transport of charge carriers and the thermal diffusivity were studied on a set of polyaniline (emeraldine) samples that were compressed at various pressures, 50–1000 MPa. Marked correlations between the plots of compression pressure dependence of the electrical resistivity, the thermal diffusivity and the sample density were observed. This study has demonstrated that in order to obtain comparable data on samples prepared by compression of polymeric powders it is necessary to use sufficiently high pressure. In the case of polyaniline powder the pressure should be higher than 400 MPa. The values of the thermal diffusivity measured on polyaniline salt and its respective base indicate that charge carriers are not dominant in a heat-transport mechanism; only less than ten per cent of the thermal diffusion in pressed polyaniline samples can be eventually attributed to charge carriers.

Graphical abstract: The influence of compression pressure on transport properties of polyaniline

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Article information

DOI
https://doi.org/10.1039/C0JM03087B
Article type
Paper
Submitted
14 Sep 2010
Accepted
14 Jan 2011
First published
18 Feb 2011

J. Mater. Chem., 2011,21, 5038-5045

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The influence of compression pressure on transport properties of polyaniline

J. Prokeš, M. Varga, I. Křivka, A. Rudajevová and J. Stejskal, J. Mater. Chem., 2011, 21, 5038 DOI: 10.1039/C0JM03087B

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