Ac conductivity of conducting polymer prepared with the use of water soluble support polymer

Abstract

The intrinsically conducting polymer, polyaniline (PANI) is synthesized by chemical oxidative polymerization process with the help of water soluble support polymer poly-vinyl alcohol (PVA). The field dependence of the dielectric response is measured in a frequency range of 42 Hz to 2 MHz and in a temperature range of 133 K to room temperature. An analysis of real and imaginary parts of dielectric permittivity with frequency and temperature are performed, showing the polydispersive nature of the material as confirmed by cote-cole plots of complex permittivity. The frequency-dependent electrical data are analyzed in the framework of the conductivity. The results are discussed in the context of models for the dc and ac transports in polymers, with results supporting hopping of charge among positively charged polaron and bipolaron states in the PANI-PVA.