NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Chemical approach for controlling nadimide cure temperature and ratePolyimide resins suitable for use as composite matrix materials are formed by copolymerization of maleic and norbornenyl endcapped monomers and oligomers. The copolymers can be cured at temperatures under about 300 C by controlling the available concentration of the maleic capped reactant. This control can be achieved by adding sufficient amounts of said maleic reactant, or by chemical modification of either copolymer, so as to either increase Diels-Alder retrogression of the norbornenyl capped reactant and/or holding initiation and polymerization to a rate compatible with the availability of the maleic capped reactant.
Document ID
19840019816
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Lauver, R. W. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
June 19, 1984
Subject Category
Nonmetallic Materials
Accession Number
84N27885
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,455,418|NASA-CASE-LEW-13770-1
Patent Application
US-PATENT-APPL-SN-404809

Related Records

IDRelationTitleN83-13258Superseded By
No Preview Available