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Radiation Durability of Candidate Polymer Films for the Next Generation Space Telescope SunshieldThe Next Generation Space Telescope (NGST), anticipated to be launched in 2009 for a 10-year mission, will make observations in the infrared portion of the spectrum to examine the origins and evolution of our universe. Because it must operate at cold temperatures in order to make these sensitive measurements, it will use a large, lightweight, deployable sunshield, comprised of several polymer film layers, to block heat and stray light. This paper describes laboratory radiation durability testing of candidate NGST sunshield polymer film materials. Samples of fluorinated polyimides CP1 and CP2, and a polvarylene ether benzimidazole. TOR-LM(TM), were exposed to 40 keV electron and 40 keV proton radiation followed by exposure to vacuum ultraviolet (VUV) radiation in the 115 to 200 nm wavelength range. Samples of these materials were also exposed to VUV without prior electron and proton exposure. Samples of polyimides Kapton HN, Kapton E, and Upilex-S were exposed to electrons and protons only, due to limited available exposure area in the VUV facility. Exposed samples were evaluated for changes in solar absorptance and thermal emittance and mechanical properties of ultimate tensile strength and elongation at failure. Data obtained are compared with previously published data for radiation durability testing of these polymer film materials.
Document ID
20030003707
Document Type
Technical Memorandum (TM)
Authors
Dever, Joyce (NASA Glenn Research Center Cleveland, OH United States)
Semmel, Charles (Qualis Corp. Huntsville, AL United States)
Edwards, David (NASA Marshall Space Flight Center Huntsville, AL United States)
Messer, Russell (QSS Group, Inc. Cleveland, OH United States)
Peters, Wanda (Swales Aerospace Greenbelt, MD United States)
Carter, Amani (Swales Aerospace Greenbelt, MD United States)
Puckett, David (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
September 7, 2013
Publication Date
April 1, 2002
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA/TM-2002-211508
AIAA Paper 2002-1564
NAS 1.15:211508
E-13285
Meeting Information
Third AIAA Gossamer Spacecraft Forum(Denver, CO)
Funding Number(s)
PROJECT: RTOP 755-A4-06
Distribution Limits
Public
Copyright
Public Use Permitted.

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