Studies on polyaniline in methane sulphonic acid (MeSA)

Polyaniline (PAn) exists in various forms distinguished by the number of protons bonded to nitrogen which determines degree of oxidation of the polymer. At a macroscopic scale, doping involves electron transfer as well as protonation of nitrogen hetero atom which stabilizes localized bound states to impart the electronic conductivity to the system. In this communication, we show that PAn can yield a conducting solution in methane sulphonic acid (MeSA) without any side reaction. We have studied the compatibility of this solution with poly methylmetha acrylate (PMMA) to yield a conducting composite.