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Improved high-temperature resistant matrix resinsA study was performed with the objective of developing matrix resins that exhibit improved thermo-oxidative stability over state-of-the-art high temperature resins for use at temperatures up to 644 K (700 F) and air pressures up to 0.7 MPa (100 psia). The work was based upon a TRW discovered family of polyimides currently licensed to and marketed by Ethyl Corporation as EYMYD(R) resins. The approach investigated to provide improved thermo-oxidative properties was to use halogenated derivatives of the diamine, 2, 2-bis (4-(4-aminophenoxy)phenyl) hexafluoropropane (4-BDAF). Polyimide neat resins and Celion(R) 12,000 composites prepared from fluorine substituted 4-BDAF demonstrated unexpectedly lower glass transition temperatures (Tg) and thermo-oxidative stabilities than the baseline 4-BDAF/PMDA polymer.
Document ID
19890011734
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Green, H. E. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Chang, G. E. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Wright, W. F. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Ueda, K. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Orell, M. K. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Date Acquired
September 5, 2013
Publication Date
April 1, 1989
Subject Category
Nonmetallic Materials
Report/Patent Number
NAS 1.26:180826
NASA-CR-180826
Accession Number
89N21105
Funding Number(s)
CONTRACT_GRANT: NAS3-23933
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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