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Electrochemical copolymerization and characterization of aniline and isoprene in aqueous p-toluene sulfonic acid solution

Authors

  • Jude O. Iroh,

    Corresponding author
    1. Materials Science and Engineering, 498 Rhodes Hall, University of Cincinnati, Cincinnati, Ohio 45219
    • Materials Science and Engineering, 498 Rhodes Hall, University of Cincinnati, Cincinnati, Ohio 45219
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  • Ramakrishnan Rajagopalan

    1. Materials Science and Engineering, 498 Rhodes Hall, University of Cincinnati, Cincinnati, Ohio 45219
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Abstract

Uniform and adherent copolymer coating of poly(aniline-co-isoprene) was successfully formed on low-carbon-steel electrodes by potentiostatic electropolymerization. Electropolymerization was performed by using aqueous p-toluene sulfonic acid solution as electrolyte. Applied potential and feed ratios of monomers (aniline and isoprene) were systematically varied and the reactions were done under aqueous conditions. The copolymer coatings were characterized by infrared spectroscopy and the formation of copolymer was confirmed by the presence of aliphatic secondary amine, aromatic secondary amine, and aliphatic CH stretch groups. The electronic structure of the copolymers was further investigated by using UV/Vis absorption spectroscopy. The electrochemistry of the formation of copolymers was studied by using cyclic voltammetry. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 184–192, 2002; DOI 10.1002/app.10298

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