ELECTROPOLYMERIZATION OF ANILINE MODIFIED BY PARA-PHENYLENEDIAMINE

Electropolymerization of aniline in perchloric acid solutions was inve stigated with presence of para-phenylenediamine (PPDA). Experimental r esults showed that the presence of PPDA promoted markedly the growth o f the polymer. The catalytic effect of PPDA on the polymerization of a niline included its contributions to both the autocatalysis and the ex ternal catalysis. Addition of PPDA with an appropriate concentration r esulted a polymer with high polymerization degree and higher conductiv ity, which were closely related to the contribution of PPDA to the aut ocatalysis in the polymerization of aniline. Memory effects in and els e properties of the catalytically electrosynthesized polyaniline were also studied.