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Chemical oxidative copolymerization of pyrrole and aniline was performed for three feed ratios at room temperature (30 o C) using FeCl3 as an initiator. The synthesis was carried out for two different initiator concentrations. The I - V plots for the respective samples have been plotted which indicate the linear or ohmic behavior of the samples with respect to field variation. The dc electrical conductivity of the copolymers was measured at a field of 27V/cm using two probe method in the temperature range of 313-673K. The log σ versus 1/T graphs for these samples have been plotted in the same temperature range. The results show transitions of the samples from metallic to semiconducting behavior and vice versa depending upon each sample at a particular temperature specific for the sample. The results show reduction in the conductivity of prepared copolymers on comparison with that of the homopolymers..

Measurement of dc Electrical Conductivity of Chemically Synthesized Pyrrole Aniline Copolymers