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Addition-type polyimides from solutions of monomeric reactantsThe 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
19720010480
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Delvigs, P. (NASA Lewis Research Center Cleveland, OH, United States)
Serafini, T. T. (NASA Lewis Research Center Cleveland, OH, United States)
Lightsey, G. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1972
Subject Category
Chemistry
Report/Patent Number
E-6750
NASA-TM-X-68011
Report Number: E-6750
Report Number: NASA-TM-X-68011
Meeting Information
Meeting: Natl. Symp. of the Soc. of Aerospace Mater. and Process Engr.
Location: Los Angeles
Start Date: April 11, 1972
End Date: April 13, 1972
Accession Number
72N18130
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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