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Graphite Fiber/Polyimide Composites with Improved Processability

Published online by Cambridge University Press:  15 February 2011

Peter Delvigs ,
David L. Klopotek  and
Paul J. Cavano
Peter Delvigs
Affiliation:
NASA Lewis Research Center, 21000 Brookpark Rd., Cleveland, OH 44135
David L. Klopotek
Affiliation:
St. Norbert College, Department of Chemistry, DePere, WI 54115
Paul J. Cavano
Affiliation:
Case Western Reserve University, Cleveland, OH 44106
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Abstract

In an effort to improve the processing characteristics of addition-type polyimide matrix resins, the use of flexibilized three-ring and four-ring aryl diamines was investigated. A series of fourteen diamines containing carbonyl and methylene, as well as thio connecting groups was synthesized. The diamines were polymerized with the dimethyl ester of 3,3,′4,4′-benzophenonetetracarboxylic acid, using the monomethyl ester of nadic acid as an end cap. The effect of diamine structure on the solubility and rheological properties during cure, as well as glass transition temperature and thermooxidative stability of neat resins was determined. Graphite fiber-reinforced composites were fabricated from selected resin formulations, and composite thermomechanical properties were investigated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 305: Symposium I – High-Performance Polymers and Polymer Matrix Composites , 1993 , 33
Copyright
Copyright © Materials Research Society 1993

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References

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