THE CHEMICAL AND PHYSICAL-PROPERTIES OF ELECTROCHEMICALLY PREPARED POLYANILINE HEXAFLUOROPHOSPHATE (PAPF6)

Polyaniline hexafluorophosphate (PAPF6) was synthesized by electrochemical oxidation from 0.2 M aniline in acetonitrile solution containing 0.1 M TEAPF6 as the supporting electrolyte. From polarographic and cyclic voltammetry results, the values of the half-wave potential (E 1/2) and an were calculated to be 774 mV and 0.589, respectively. The morphology of the PAPF6 sample was determined from SEM. Thermal analyses for PAPF6 and other polyaniline-based systems show distinguishable, thermal characteristics depending on the doping methods for the anions. Also, the maximum values (R(max)) of the reaction rates (R) for these polymers were obtained. The electrical conductivity of the PAPF6 Pellet was measured at temperatures from -170 to 25-degrees-C. From a plot of conductivity vs. 1/T, an activation energy (Ea) of 0.057 eV was obtained. The conduction mechanism in the pressed pellet of PAPF6 is suggested to be hopping conduction. The various ESR-parameters were obtained from the ESR curve at room temperature.