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Application of electrochemically produced and oxidized poly(3,4‐ethylenedioxythiophene) as anticorrosive additive for paints: Influence of the doping level
Author(s) -
Liesa Francisco,
Ocampo Cintia,
Alemán Carlos,
Armelin Elaine,
Oliver Ramón,
Estrany Francesc
Publication year - 2006
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.23925
Subject(s) - materials science , poly(3,4 ethylenedioxythiophene) , pedot:pss , chronoamperometry , corrosion , conductive polymer , doping , electrochemistry , coating , epoxy , monomer , polymerization , polymer , chemical engineering , composite material , fourier transform infrared spectroscopy , polymer chemistry , electrode , cyclic voltammetry , chemistry , optoelectronics , engineering
This work investigates the resistance against marine corrosion of an epoxy‐based coating modified by the addition of electrochemically produced and oxidized poly(3,4‐ethylenedioxythiophene) (PEDOT). For this purpose, electrodeposition of PEDOT was performed on steel electrodes by electrochemical polymerization of 3,4‐ethylenedioxythiophene. The doping level of the resulting material was increased by chronoamperometry and chronopotentiometry (CP), three different oxidation degrees being achieved. The electrochemical and electrical properties of such three samples, which were used as anticorrosive additives, were examined. Furthermore, the physical properties of the coating before and after addition of the conducting polymers were characterized using FTIR, thermal analyses, and mechanical properties evaluations. Accelerated corrosion tests indicated that the polymer with the highest amount of positive charge per monomeric unit, which was achieved by CP, enhances considerably the anticorrosive protection imparted by the coating. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1592–1599, 2006