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Dielectric Relaxation Phenomena and Electric Properties of Conductive Composite Polyurethane/Polyaniline Films |
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| Authors: | C Vanga Bouanga K Fatyeyeva P-Y Baillif C Khaokong J-F Pilard M Tabellout |
| Institution: | 1. Laboratoire de Physique de l'Etat Condensé, UMR CNRS 6087, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France;2. Laboratoire de Physique de l'Etat Condensé, UMR CNRS 6087, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France
Laboratoire “Polymères, Biopolymères et Surfaces”, FRE 3101, CNRS Université de Rouen, Bd. Maurice de Broglie, 76821 Mont Saint Aignan cedex, France;3. Unité de Chimie Organique Moléculaire et Macromoléculaire, UMR CNRS 6011, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France |
| Abstract: | Summary: Composite polyurethane/polyaniline (PU/PANI) films have been chemically prepared by oxidative in-situ polymerization of aniline inside the previously swelled PU film. Swelling kinetic studies have shown that for PU films the swelling degree of aniline is 25 wt.%. The dielectric and electrical properties of the composite films were measured using dielectric relaxation spectroscopy and four-probe method. Dielectric measurements as a function of temperature and frequency revealed the presence of a relaxation process for the composite PU/PANI-HCl film. This relaxation was explained in terms of interfacial polarization due to the double-layered structure of the composite film. The activation energy values found by dielectric and electrical measurements are close and this result confirms the conducting character of the PANI containing layer. |
| Keywords: | composites conductivity dielectric relaxation doping polyaniline polyurethane |