NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
DC electrical, thermal, and spectroscopic properties of various condensation polyimides containing surface cobalt oxideDoping polyimides with cobalt ion causes the room temperature direct current electrical resistivity to decrease relative to the polymer alone, the reduction being most pronounced for the air-side of the cobalt modified polyimides. At a constant electrical field, resistivity for the volume, air-side and glass-side modes decreases yet further with an increase in temperature as expected for semiconductors and insulators. X-ray photoelectron spectroscopy indicates the air-side of the cobalt modified polyimides is predominantly Co3O4. The bulk resistivity of the air-side and activation energy of conduction for this surface are comparable to high purity sintered Co3O4. Charging characteristics at room temperature indicate a substantial polymer matrix contribution to both the glass-side and volume mode measurements but a negligible contribution to the air-side electrical properties. Volume electrical resistivity for similar additive levels is reduced by increasing the molecular flexibility of the host polymer.
Document ID
19870042382
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rancourt, J. D.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Boggess, R. K.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Horning, L. S.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Taylor, L. T.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Electrochemical Society, Journal
Volume: 134
ISSN: 0013-4651
Subject Category
Chemistry And Materials (General)
Accession Number
87A29656
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available