Accession Number : ADA310395

Title :   Improved High-Temperature Resistant Matrix Resins.

Descriptive Note : Final contract rept. 29 Sep 83-29 Mar 85,

Corporate Author : TRW SPACE AND DEFENSE SECTOR REDONDO BEACH CA

Personal Author(s) : Green, H. E. ; Chang, G. E. ; Wright, W. F. ; Ueda, K. ; O'Rell, M. K.

PDF Url : ADA310395

Report Date : 21 APR 1989

Pagination or Media Count : 84

Abstract : A 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 544K (700 deg 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 EYMYDR resins. The approach investigated to provide improved thermo-oxidative properties was to use halogenated derivatives of the diamine, 2,2-bis4-(4-AMINOPHENOXY)PHENYL)HEXAFLUOROPROPANE (4-BDAF). Polyimide neat resins and CelionR 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.

Descriptors :   *MATRIX MATERIALS, *POLYIMIDE RESINS, POLYMERS, THERMAL STABILITY, TRANSITION TEMPERATURE, OXIDATION, ETHYL RADICALS, THERMAL RESISTANCE, FLUORINE COMPOUNDS.

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE