Dielectric properties characterization of conductive polymeric materials at temperature and Frequency Variation

The paper comprises a study of dielectric characteristics at conductive polymers. Oxidative polymerization of acrylonitrile (AN) initiated by Ce(IV) - oxalic acid redox system in the aqueous medium was performed to obtain polyacrylonitrile and then conducting Polyacrylonitrile/polypyrrole (PAN/PPy), Polyacrylonitril/poly - N - methyl pyrrole (PAN - PNMPy), Polyacrylonitrile/poly - N - phenyl pyrrole (PAN - PNPhPy) composite thin films were prepared by polymerization of pyrrole on PAN matrix. In the first part of the work are described the way to obtain composite thin films, consisting of 200 μl of pyrrole, N - methyl pyrrole and N - phenyl pyrrole were added into the Polyacrylonitrile/Dimethylformamide (PAN/DMF) solutions to achieve polymerization of pyrrole by cerium (IV). The main characteristics analyzed are real and imaginary permittivity, conductivity and dielectric loss factor, frequency and temperature.