Studies on Electrochemical, Optical and Electrical Conductivity of Conducting Composite of o-Anisidine, o-Toluidine and Their Co-polymer

摘要

A conducting composite of poly(o-anisidine), poly(o-toluidine) and poly(o-anisidine-co-o-toluidine) using incorporation of TiO2 and SiO2 was prepared by electrochemical polymerization. The films were electro-polymerized in solution containing 0.1 M monomer(s), 1 M sulphuric acid as supporting electrolyte and 10~(-5) M TiO2 and SiO2 by applying a sequential linear potential scan rate of 50 mV/s between —0.2 and 1.0 V versus an Ag/AgCl electrode. The characterization of the composites was done by cyclic voltametry, UV-Vis spectroscopy, electrical conductivity and thermogravimetric analysis. It is observed that the UV-Vis peaks appear in the region of the conducting emerladine salt (ES) phase. Overall, the polymers prepared using TiO2 have higher conductivity than SiO2, with poly(o-toluidine)-TiO2 conducting composite having the highest conductivivty. The composite does not lose its colour at higher temperature and, hence, can be utilized as conductive pigments required for anti-electrostatic applications.