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Polymer coatings by electropolymerization of some vinyl monomers
Author(s) -
Lee Chi S.,
Bell James P.
Publication year - 1995
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.1995.070570805
Subject(s) - materials science , persulfate , polymerization , ammonium persulfate , monomer , acrylonitrile , polymer , polymer chemistry , potassium persulfate , chemical engineering , coating , copolymer , composite material , chemistry , catalysis , organic chemistry , engineering
Electroinitiated polymerization coatings are uniform, thin, tightly adherent, conformal, and economical to produce. This article describes use of a novel (for electropolymerization) persulfate initiator to rapidly polymerize a moderate T g crosslinked acrylic coating. Polymer coatings derived from the monomers acrylamide, acrylonitrile, and N , N ′‐methylenebisacrylamide were synthesized on an aluminum cathode by persulfate electroinitiated polymerization at room temperature. The crosslinked polymer was brittle ( T g = 239°C) but thermally stable (degradation temperature = 310°C). The coatings were spongy and contained some small cracks when polymerized at low current density (0.1 mA/cm 2 ). However, thicker coatings with fewer cracks were obtained at higher current densities. Persulfate was found to be an effective initiator for polymerization in this system, and the initiation mechanism was confirmed to be free radical. In general, it appears possible to produce thin, uniform coatings on aluminum by this route. © 1995 John Wiley & Sons, Inc.