Electrochemical synthesis and characterization of the conducting copolymer poly(aniline-co-o-anisidine-co-o-toluidine)

Copolymerization of aniline, o-anisidine and o-toluidine was achieved electrochemically in aqueous solution containing H 2 SO 4 as supporting electrolyte. The copolymer compositions can be altered by varying the monomer feed ratios during electrosynthesis. The films were electropolymerized in solution containing monomers in various ratios (0.025 to 0.1 M) and 1 M sulphuric acid as electrolyte by applying a sequential linear potential scan rate of 50 mV/s between -0.2 to 1.0 V versus Ag/AgCl electrode. The copolymers were characterized by cyclic voltammetric, conductivity measurement, UV-Vis spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), CHN elemental analysis and optical microscopy photographs.