Study of dc electrical conductivity, magnetic susceptibility and thermal behavior of pyrrole aniline copolymer

Abstract

Chemical copolymerization of pyrrole and aniline has been carried out by taking the monomers in equimolar proportion. The structural analysis of the copolymer was done with the help of FTIR, WAXD and SEM techniques, the results confirm the formation of new material involving both pyrrole and aniline units. The dc electrical conductivity of the copolymer has been recorded up to 673k using two probe method. The log σ Vs 1/T plot shows the transition of the sample from metallic to semi conducting behavior and vice versa, at a particular temperature. The magnetic susceptibility was recorded at magnetic field of 0.1KG in the temperature range 313-507 K by using Guoy's method. The Thermal behavior of the copolymer was studied using DTA-TGA revealing variation in the Tg of copolymer when compared to homopolymers.