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Electrodeposition of polyimides from nonaqueous emulsions
Author(s) -
Uebner Michael,
Ng Ka M.
Publication year - 1988
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.1988.070360702
Subject(s) - materials science , emulsion , chemical engineering , viscosity , coating , metal , particle (ecology) , conductivity , electrophoretic deposition , electrophoresis , polymer chemistry , composite material , chromatography , chemistry , metallurgy , oceanography , engineering , geology
A theoretical and experimental study was carried out to investigate the process of electrodepositing a polyamic acid film from a nonaqueous emulsion onto a metal surface (copper, aluminum) as well as the subsequent drying and imidization steps. The rate of film growth is controlled by the electrophoresis of the polymer emulsion particles to one of the electrodes and the concomitant film compaction due to the outflow of the solvent caused by electro‐osmosis. Parameters affecting the coating process such as particle size, charge, ζ potential, viscosity of the liquid medium, conductivity of the deposited film, etc. were considered.