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  • 1
    facet.materialart.
    Unknown
    In:  Other Sources
    Publication Date: 2019-07-13
    Description: The verification philosophy for the Space Telescope (ST) has evolved from years of experience with multispacecraft programs modified by the new factors introduced by the Space Transportation System. At the systems level of test, the ST will undergo joint qualification/acceptance tests with environment simulation using Lockheed's large spacecraft test facilities. These tests continue the process of detecting workmanship defects and module interface incompatibilities. The test program culminates in an 'all up' ST environmental test verification program resulting in a 'ready to launch' ST.
    Keywords: ASTRONOMY
    Type: EASCON ''80; Electronics and Aerospace Systems Conference; Sep 29, 1980 - Oct 01, 1980; Arlington, VA
    Format: text
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  • 2
    Publication Date: 2019-06-28
    Description: 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 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.
    Keywords: NONMETALLIC MATERIALS
    Type: NASA-CR-180826 , NAS 1.26:180826
    Format: application/pdf
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