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Dielectric Properties of Piezoelectric Polyimides

Published online by Cambridge University Press:  10 February 2011

Z. Ounaies ,
J. A. Young ,
J. O. Simpson  and
B. L. Farmer
Z. Ounaies
Affiliation:
National Research Council, NASA Langley Research Center, Hampton, VA 23681
J. A. Young
Affiliation:
University of Virginia, Department of Materials Science and Engineering, Charlottesville, VA 22903
J. O. Simpson
Affiliation:
Composites and Polymers Branch, NASA Langley Research Center, Hampton, VA 23681
B. L. Farmer
Affiliation:
University of Virginia, Department of Materials Science and Engineering, Charlottesville, VA 22903
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Abstract

Molecular modeling and dielectric measurements are being used to identify mechanisms governing piezoelectric behavior in polyimides such as dipole orientation during poling, as well as degree of piezoelectricity achievable. Molecular modeling on polyimides containing pendant, polar nitrile (CN) groups has been completed to determine their remanent polarization. Experimental investigation of their dielectric properties evaluated as a function of temperature and frequency has substantiated numerical predictions. With this information in hand, we are then able to suggest changes in the molecular structures, which will then improve upon the piezoelectric response.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 459: Symposium Y – Materials for Smart Systems II , 1996 , 53
Copyright
Copyright © Materials Research Society 1997

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References

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