Chemical and electrochemical polymerization of pyrrole in the presence of N-substituted carbazoles

Carbazole, N-ethylcarbazole and N-vinylcarbazole were polymerized in the presence of pyrrole both chemically by ceric ammonium nitrate (CAN), and electrochemically. The resulting products (homopolymers, copolymers and composites) were characterized by Fourier transform infrared spectroscopy (FT-IR) and UV-Visible spectroscopy, 4-point probe conductivity measurements, scanning electron microscopy (SEM), elemental analysis and X-ray measurements. The specific electrical conductivity of the chemically synthesized homopolymers and composites can be increased in comparison to that of the electrochemical ones, depending on the concentration and addition rate of CAN. The conductivities of copolymers obtained by using CAN are in the range of 10^-7-10^-3 S cm^-1.