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The chemical and physical properties of electrochemically prepared polyaniline hexafluorophosphate (PAPF 6 )
Author(s) -
Choi Kyung Moon,
Kim Keu Hong
Publication year - 1992
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1992.070440502
Subject(s) - polyaniline , cyclic voltammetry , hexafluorophosphate , aniline , acetonitrile , analytical chemistry (journal) , electrolyte , activation energy , electrochemistry , materials science , conductive polymer , supporting electrolyte , thermal conduction , chemistry , polymer , electrode , composite material , organic chemistry , catalysis , polymerization , ionic liquid
Polyaniline hexafluorophosphate (PAPF 6 ) was synthesized by electrochemical oxidation from 0.2 M aniline in acetonitrile solution containing 0.1 M TEAPF 6 as the supporting electrolyte. From polarographic and cyclic voltammetry results, the values of the half‐wave potential \documentclass{article}\pagestyle{empty}\begin{document}$\left( {{\rm E}{\textstyle{1 \over 2}}} \right)$\end{document} and αn were calculated to be 774 m V and 0.589, respectively. The morphology of the PAPF 6 sample was determined from SEM. Thermal analyses for PAPF 6 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 PAPF 6 pellet was measured at temperatures from −170 to 25°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 PAPF 6 is suggested to be hopping conduction. The various ESR‐parameters were obtained from the ESR curve at room temperature.