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Dielectric Relaxation Phenomena and Electric Properties of Conductive Composite Polyurethane/Polyaniline Films
Author(s) -
Bouanga C. Vanga,
Fatyeyeva K.,
Baillif P.Y.,
Khaokong C.,
Pilard J.F.,
Tabellout M.
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201050420
Subject(s) - materials science , polyaniline , dielectric , composite number , composite material , polyurethane , polymerization , swelling , aniline , activation energy , dielectric spectroscopy , relaxation (psychology) , polymer chemistry , polymer , electrode , chemistry , electrochemistry , organic chemistry , psychology , social psychology , optoelectronics
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.