PROPERTIES OF POLYPYRROLE PREPARED BY CHEMICAL POLYMERIZATION USING AQUEOUS-SOLUTION CONTAINING FE-2(SO4)(3) AND ANIONIC SURFACTANT

This study deals with polypyrrole (PPy) prepared with an aqueous solut ion. The combinations of Fe-2(SO4)(3) as an oxidant and anionic surfac tants, such as sodium dodecylbenzenesulfonate, sodium alkylnaphthalene sulfonate and sodium alkylsulfonate, brought about enhanced conductivi ty as well as increased yield of the resultant PPy. These phenomena re sulted from the large-sized surfactant anions being predominantly inco rporated into the PPy backbone. Furthermore, the addition of surfactan ts accelerated the polymerization reactions. This seemed to derive fro m an insoluble product temporarily being formed from Fe-2(SO4)(3) and the surfactant functions being innumerable initial points of the polym erization reactions. PPy prepared with surfactants also showed high th ermal and moisture stabilities in air at 125 degrees C, and at 85 degr ees C and 85% RH.