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Conductive coating films based on low density In 2 O 3 powders and polymer latexes
Author(s) -
Hong Liang,
Ruckenstein Eli
Publication year - 1996
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(19960808)61:6<901::aid-app3>3.0.co;2-l
Subject(s) - materials science , coating , polymer , composite material , copolymer , curing (chemistry) , acrylonitrile butadiene styrene , chemical engineering , engineering
Several kinds of conductive coating films were prepared from a low‐density indium(III) oxide powder (which was employed because it provides a much higher volume for the same weight) and polymer latexes. The low‐density In 2 O 3 , which is an electrically conductive pigment, was prepared by pyrolysis followed by the combustion of water‐swellable polymer microspheres imbibed with In(NO 3 ) 3 , the precursor of In 2 O 3 . Either acrylamide/ N,N' ‐methylenebisacrylamide or poly(vinylalcohol)/glutaricdialdehyde was used to generate spherical hydrogel particles. The polymer latexes with which the In 2 O 3 was mixed had a soft core and a hard shell structure to ensure that the coating film has suitable mechanical properties in addition to conductivity. Acrylonitrile/butadiene/styrene copolymer ABS or acrylonitrile/butylacrylate/styrene copolymer ABAS latexes were used as binders for the conductive pigment. The powder coating followed by hot pressing, the water‐borne coating consisting of low‐density In 2 O 3 and polymer latexes followed by curing, or the colloidal dispersion coating was used to deposit flexible conductive coating films on polyester sheets. The conductive pigment density and the polymer latexes' size and flowability are the factors that affect the characteristics of the film. We found that the colloidal suspension coating procedure based on ABAS latexes achieves better electrical and mechanical properties for the coating films. © 1996 John Wiley & Sons, Inc.