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The reaction efficiency of thermal energy oxygen atoms with polymeric materialsThe reaction efficiency of several polymeric materials with thermal-energy (0.04 eV translational energy), ground-state (O3P) oxygen atoms was determined by exposing the materials to a room temperature gas containing a known concentration of atomic oxygen. The reaction efficiency measurements were conducted in two flowing afterglow systems of different configuration. Atomic oxygen concentration measurements, flow, transport and surface dose analysis is presented in this paper. The measured reaction efficiencies of Kapton, Mylar, polyethylene, D4-polyethylene and Tedlar are .001 to .0001 those determined with high-energy ground-state oxygen atoms in low earth orbit or in a high-velocity atom beam. D4-polyethylene exhibits a large kinetic isotope effect with atomic oxygen at thermal but not hyperthermal atom energies.
Document ID
19910065192
Document Type
Conference Paper
Authors
Koontz, S. L.
(NASA Johnson Space Center Houston, TX, United States)
Nordine, Paul
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: Annual Meeting of the Minerals, Metals, and Materials Society
Location: Anaheim, CA
Country: United States
Start Date: February 17, 1990
End Date: February 22, 1990
Sponsors: Minerals, Metals and Materials Society, ASM International
Accession Number
91A49815
Distribution Limits
Public
Copyright
Other

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