Unique dielectric properties in polyaniline/poly(vinylidene fluoride) composites induced by temperature variation

作者：Yuan Jin Kai; Dang Zhi Min; Bai Jinbo

来源：Physica Status Solidi-Rapid Research Letters, 2008, 2(5): 233-235.

DOI：10.1002/pssr.200802089

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 (f(PANI)) were studied in a wide temperature range. An increase in the effective conductivity (sigma(eff)) and dielectric permittivity (epsilon(eff)) was observed with increasing temperature in all PANI/PVDF composites. Particularly, for the composite with f(PANI) = 0-01, less than the percolation threshold (f(C) = 0.045), the increase in sigma(eff) and epsilon(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.

• 出版日期2008-10
• 单位北京化工大学