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Effect of process parameters on the electropolymerization potential and rate of formation of polypyrrole on stainless steel
Author(s) -
Iroh Jude O.,
Su Wencheng
Publication year - 1997
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/(sici)1097-4628(19971226)66:13<2433::aid-app6>3.0.co;2-j
Subject(s) - polypyrrole , oxalic acid , pyrrole , polymerization , current density , materials science , aqueous solution , monomer , electrolyte , supporting electrolyte , electrode , polymer chemistry , chemical engineering , chemistry , nuclear chemistry , inorganic chemistry , composite material , organic chemistry , polymer , physics , quantum mechanics , engineering
Polypyrrole coatings were formed on stainless steel working electrodes in aqueous oxalic acid solution. The rate of formation of polypyrrole coatings on stainless steel increased proportionately with the current density but increased slightly with increased pyrrole concentration. Increasing oxalic acid concentration also had no significant change in the polymerization rate. The electropolymerization potential of pyrrole decreased significantly from 1.5 to 0.8 V versus SCE when the working electrode was polished. The polymerization potential, E p , of pyrrole, increased however, with increased current density and decreased exponentially with the initial monomer and electrolyte concentration, respectively. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 2433–2440, 1997