Dielectric Relaxation Phenomena and Electric Properties of Conductive Composite Polyurethane/Polyaniline Films

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 proper...

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Bibliographic Details
Published in:Macromolecular symposia. 2010-04, Vol.290 (1), p.175-184
Main Authors: Bouanga, C. Vanga, Fatyeyeva, K., Baillif, P.-Y., Khaokong, C., Pilard, J.-F., Tabellout, M.
Format: Article
Language:English
Subjects:
Aniline
composites
Conduction
conductivity
Dielectric relaxation
Dielectrics
doping
Electrical properties
polyaniline
Polyanilines
polyurethane
Polyurethane resins
Swelling
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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.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.201050420