Poly(anthranilic acid), prepared by oxidative polymerization of anthranilic acid with ammonium peroxodisulfate, is soluble in N-methyl-2-pyrrolidone. The casting of the resulting solution forms a smooth film of poly(anthranilic acid). Heat treatment of the poly(anthranilic acid) film at about 240 °C produces a polyaniline film accompanying the elimination of carbon dioxide, which can provide a new method of preparation of a polyaniline film from the precursor.
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Toshima et al. (1994) studied this question.
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