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The electrochemical oxidation of diphenylamine in acetonitrile produces an adherent uniform polymer film which exhibits mutiple colour variation(yellow-green-blue) in a wide range of potential scan. The polymerization mechanism and the structure of the polymer were studied by cyclic voltammetry, FT-IR and in situ ESR. The results indicate that the electrochemical polymerization of diphenylamine belongs to a cationic radical polymerization process. During electrolysis, only oligomers were initialy produced, then polymer film was formed on the electrode surface. The electropolymerization performs via the 4,4’ C-C phenyl-phenyl coupling mechanism.
The electrochemical mechanism of the structure of the polymer were studied by cyclic voltammetry, FT- IR and in situ ESR. The results indicate that the electrochemical polymerization of diphenylamine belongs to a cationic radical polymerization process. The electrolysis, only oligomers were initialy produced, then polymer film was formed on the electrode surface. ’CC phenyl-phenyl coupling mechanism.