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Anodic synthesis of sulfur‐bridged polyaniline coatings onto Fe sheets
Author(s) -
Mengoli Giuliano,
Musiani Marco M.,
Pelli Beatrice,
Vecchi Enrico
Publication year - 1983
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.1983.070280318
Subject(s) - polyaniline , aniline , sulfur , polymer chemistry , sulfide , coating , polymerization , materials science , anode , polymer , conductive polymer , azobenzene , polysulfide , ammonium persulfate , electrochemistry , chemistry , inorganic chemistry , organic chemistry , electrode , electrolyte
Sulfur‐bridged polyaniline coatings are obtained onto Fe anodes by electrolyzing a basic solution of one aniline and ammonium sulfide. Their sulfur content ranges from 7% to 17%, depending on the substituents on aniline. Variously substituted anilines may be polymerized in this way and coating pollution by azobenzene formed in a side reaction is almost completely avoided. Sulfur probably enters the polymer chains through a free radical mechanism. HS • intermediates being formed by both homogeneous and anodic oxidation of HS − anions. Coatings from N ‐allylaniline, being thermally curable, show satisfactory physical properties.