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Polyimide resin composites via in situ polymerization of monomeric reactantsThermo-oxidatively stable polyimide/graphite-fiber composites were prepared using a unique in situ polymerization of monomeric reactants directly on reinforcing fibers. This was accomplished by using an aromatic diamine and two ester-acids in a methyl alcohol solvent, rather than a previously synthesized prepolymer varnish, as with other A-type polyimides. A die molding procedure was developed and a composite property characterization conducted with high modulus graphite fiber tow. Flexure, tensile, compressive, and shear tests were conducted at temperatures from 72 to 650 F on laminates before and after exposures at the given temperatures in an air environment for times up to 1000 hours. The composite material was determined to be oxidatively, thermally, and hydrolytically stable.
Document ID
19740053090
Document Type
Conference Proceedings
Authors
Cavano, P. J. (TRW, Inc. Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Subject Category
MATERIALS, NONMETALLIC
Meeting Information
National Symposium and Exhibition(Buena Park, CA)
Funding Number(s)
CONTRACT_GRANT: NAS3-15829
Distribution Limits
Public
Copyright
Other