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The Dependence of Atomic Oxygen Undercutting of Protected Polyimide Kapton(tm) H upon Defect SizeUnderstanding the behavior of polymeric materials when exposed to the low-Earth-orbit (LEO) environment is important in predicting performance characteristics such as in-space durability. Atomic oxygen (AO) present in LEO is known to be the principal agent in causing undercutting erosion of SiO(x) protected polyimide Kapton(R) H film, which serves as a mechanically stable blanket material in solar arrays. The rate of undercutting is dependent on the rate of arrival, directionality and energy of the AO with respect to the film surface. The erosion rate also depends on the distribution of the size of defects existing in the protective coating. This paper presents results of experimental ground testing using low energy, isotropic AO flux together with numerical modeling to determine the dependence of undercutting erosion upon defect size.
Document ID
20010068905
Document Type
Preprint (Draft being sent to journal)
Authors
Snyder, Aaron (NASA Glenn Research Center Cleveland, OH United States)
deGroh, Kim K. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
June 1, 2001
Subject Category
Spacecraft Design, Testing and Performance
Report/Patent Number
NAS 1.15:210596
E-12554
NASA/TM-2001-210596
Meeting Information
Fifth International Conference on Protection of Materials and Structures for LEO Space Environment(Arcachon)
Funding Number(s)
PROJECT: RTOP 755-A4-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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