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New Developments in Soluble Thermoplastic High Glass Transition Temperature Polyimides

Published online by Cambridge University Press:  15 February 2011

M. E. Rogers
Affiliation:
Department of Chemistry and The NSF Science and Technology Center: High Performance Polymeric Adhesives and Composites Virginia Polytechnic Institute and State University Blacksburg, VA 24061
T. M. Moy
Affiliation:
Department of Chemistry and The NSF Science and Technology Center: High Performance Polymeric Adhesives and Composites Virginia Polytechnic Institute and State University Blacksburg, VA 24061
Y. J. Kim
Affiliation:
Department of Chemistry and The NSF Science and Technology Center: High Performance Polymeric Adhesives and Composites Virginia Polytechnic Institute and State University Blacksburg, VA 24061
J. E. McGrath*
Affiliation:
Department of Chemistry and The NSF Science and Technology Center: High Performance Polymeric Adhesives and Composites Virginia Polytechnic Institute and State University Blacksburg, VA 24061
*
*To whom all correspondence should be addressed
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Abstract

Utilizing solution imidization, molecular weight and end group control techniques, soluble, fully cyclized polyimides with very high glass transition temperatures have been developed to meet high temperature applications. Mechanistic aspects are investigated for solution imidization by both the polyamic acid route and by the ester-acid route. Polyimides based on pyromellitic dianhydride and a 3F diamine exhibit glass transition temperatures of 420 °C. These polyimides are soluble in polar aprotic solvents and form tough, transparent films which demonstrate mechanical integrity and thermooxidative stability at 700 °F. Various processing routes are explored to demonstrate the viability of these materials in high temperature applications. Details of the synthesis and characterization of these materials will be provided.

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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