Addition-type polyimides from solutions of monomeric reactants.The monomeric reactants approach was used to fabricate addition-type polyimide/graphite fiber composites with improved mechanical properties and thermal stability characteristics over those of composites derived from addition-type amide acid prepolymers. A screening study of 24 different monomer combinations was performed. The results of a more extensive investigation of a selected number of monomer combinations showed that the combination providing the best thermomechanical properties was 5-norbornene-2,3-dicarboxylic acid monomethyl ester/4,4'-methylenedianiline/3,3'4,4'-benzophenonetetracarboxylic acid dimethyl ester at a molar ratio of 2/3.09/2.09.
Document ID
19720044425
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Delvigs, P.
Serafini, T. T.
Lightsey, G. R. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1972
Subject Category
Materials, Nonmetallic
Meeting Information
Meeting: Materials review for ''72; National Symposium and Exhibition