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A review of processable high temperature resistant addition-type laminating resinsAn important finding that resulted from research that was conducted to develop improved ablative resins was the discovery of a novel approach to synthesize processable high temperature resistant polymers. Low molecular weight polyimide prepolymers end-capped with norbornene groups were polymerized into thermo-oxidatively stable modified polyimides without the evolution of void producing volatile materials. This paper reviews basic studies that were performed using model compounds to elucidate the polymerization mechanism of the so-called addition-type polyimides. The fabrication and properties of polyimide/graphite fiber composites using A-type polyimide prepolymer as the matrix are described. An alternate method for preparing processable A-type polyimides by means of in situ polymerization of monomeric reactants on the fiber reinforcement is also described. Polyimide/graphite fiber composite performance at elevated temperatures is presented for A-type polyimides.
Document ID
19740039357
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Serafini, T. T.
Delvigs, P.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Chemistry
Meeting Information
Meeting: Conference on Polymeric Materials for Unusual Service Conditions
Location: Moffett Field, CA
Start Date: November 29, 1972
End Date: December 1, 1972
Accession Number
74A22107
Distribution Limits
Public
Copyright
Other

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