Several water-soluble polymers were used as templates for the in situ polymerization of pyrrole to determine their effect on the generation of nanosized polypyrrole (PPy) particles. The polymers used include: polyvinyl alcohol (PVA), polyethylene oxide (PEO), poly(vinyl butyral), polystyrene sulfonic acid, poly(ethylene-alt-maleic anhydride) (PEMA), poly(octadecene-alt-maleic anhydride), poly(N-vinyl pyrrolidone), poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate), poly(N-isopropyl acrylamide), poly(ethylene oxide-block-propylene oxide), hydroxypropyl methyl cellulose, and guar gum. The oxidative polymerization of pyrrole was carried out with FeCl 3 as an oxidant. The morphology of PPy particles obtained after drying the resulting aqueous dispersions was examined by optical microscopy, and selected samples were further analyzed
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