EFFECTS OF PH OF ELECTROLYTE SOLUTION SYSTEMS ON THE ELECTROCHEMICAL PROPERTIES OF POLY(N-SUBSTITUTED PYRROLE)S

Effects of pH of different electrolyte solution systems on the electro chemical activities and stabilities of polypyrrole(PPy), poly(N-methyl pyrrole) [poly(N-M.P.)], poly(N-ethylpyrrole) [poly(N-E.P.)], and poly (N-phenylpyrrole) [poly(N-P.P.)] films were investigated. For electrol yte solution systems, used were TBADS/ACN, LiClO4/PC, LiClO4/THF, LiCl O4/DMSO, and LiClO4/H2O. The electrolyte solution systems became more basic as the monomers were polymerized and the polymerized films were cycled. The oxidation peak potential was increased and the stability o f polymer films was decreased as the pH of the electrolyte solution sy stems was decreased. It was found that the film surface became less de nse when the cycling was done in the strong acidic electrolyte solutio n systems.