Abstract

We present the first study of the chemical interconversion between leucoemeraldine and emeraldine bases of polyaniline in relation to the molecular weight (MW) and molecular weight distribution (MWD). Electronic absorption spectroscopy and GPC were employed to monitor the changes in the oxidation state and MW of the polyaniline, soluble in NMP during the redox reactions. The MW and MWD of polyaniline were found to change drastically when the redox reactions were performed with the polymers in the solid phase while relatively little when the reactions were carried out with the polymers in the solution phase

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