Unique dielectric properties in polyaniline/poly(vinylidene fluoride) composites induced by temperature variation |
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| Authors: | Jin‐Kai Yuan Zhi‐Min Dang Jinbo Bai |
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| Institution: | 1. Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China;2. Lab. MSSMAT, CNRS UMR 8579, Ecole Centrale de Paris, Grande Voie des Vignes, Chatenay Malabry Cedex 92295, France |
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| Abstract: | To explore an effect of temperature on the dielectric properties in polyaniline/poly(vinylidene fluoride) (PANI/PVDF) composites, the dielectric properties of these composites with different volumetric fractions of PANI (?PANI) were studied in a wide temperature range. An increase in the effective conductivity (σeff) and dielectric permittivity (?eff) was observed with increasing temperature in all PANI/PVDF composites. Particularly, for the composite with ?PANI = 0.01, less than the percolation threshold (?C = 0.045), the increase in σeff and ?eff was most significant. A tunneling effect could be responsible for the unique dielectric properties. The results provided us useful information related to the microstructure of composites, which was not reported previously. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | 77 22 Ch 77 84 Jd 77 84 Lf |
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