Abstract

Molecular interactions in polypyrrole (PPy) doped with dodecylbenzene sulfonic acid anion were studied as a key factor affecting solubility of the polymer. The bulky dopant molecules are able to restrain the molecular interactions in as-polymerized PPy, but molecular interaction increases gradually as time elapses, causing insolubilization of PPy powder. Insolubilization results mainly from a formation of crosslinks between polymer chains.

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