Polypyrrole is synthesisedvia thermal decarboxylation of a precursor monomer, pyrrole-2-carboxylic acid, using ferric salts in both supercritical carbon dioxide and supercritical fluoroform; pressed pellet conductivities were as high as 2×10–2 S cm–1 and scanning electron microscopy studies revealed an unusual non-spherical morphology.
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Kerton et al. (1997) studied this question.
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