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Pyrolyzed, conducting kapton polyimide: An electrically conducting material
Author(s) -
Hu C. Z.,
Andrade J. D.
Publication year - 1985
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.1985.070301116
Subject(s) - polyimide , materials science , kapton , pyrolysis , x ray photoelectron spectroscopy , conductivity , composite material , amorphous solid , electrical resistivity and conductivity , electrical conductor , chemical engineering , organic chemistry , chemistry , layer (electronics) , engineering , electrical engineering
Polyimide was pyrolyzed in an argon atmosphere at 900°C for 1h. The room temperature conductivity of the polyimide gradually increased from 15 to 100 S/cm with increased pyrolysis time. Further increase in the pyrolysis time did not increase the conductivity. X‐ray photo‐electron spectroscopy (XPS) showed that the polyimide changed from pure insulator to conductor; detailed XPS spectra of carbon, nitrogen, and oxygen 1s bands showed no further elemental decomposition of the polyimide at 900°C. The high temperature treatment results in internal rearrangement to form a large, dense heterocyclic network. The film probably consists of tiny conductive particles dispersed in an amorphous carbon matrix. The polyimide is placed between two quartz plates during pyrolysis; the resulting film is flat, has uniform conductivity, is nonbrittle, has high chemical resistance, and shows better mechanical strength than films pyrolyzed in free‐standing conditions.