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Rehydration Data for the Materials International Space Station Experiment (MISSE) Polymer FilmsAtomic oxygen erosion of polymers in low Earth orbit (LEO) poses a serious threat to spacecraft performance and durability. Forty thin film polymer and pyrolytic graphite samples, collectively called the PEACE (Polymer Erosion and Contamination Experiment) Polymers, were exposed to the LEO space environment on the exterior of the ISS for nearly four years as part of the Materials International Space Station Experiment 1 & 2 (MISSE 1 & 2) mission. The purpose of the MISSE 2 PEACE Polymers experiment was to determine the atomic oxygen (AO) erosion yield (E(sub y), volume loss per incident oxygen atom) of a wide variety of polymers exposed to the LEO space environment. The Ey values were determined based on mass loss measurements. Because many polymeric materials are hygroscopic, the pre-flight and post-flight mass measurements were obtained using dehydrated samples. To maximize the accuracy of the mass measurements, obtaining dehydration data for each of the polymers was desired to ensure that the samples were fully dehydrated before weighing. A comparison of dehydration and rehydration data showed that rehydration data mirrors dehydration data, and is easier and more reliable to obtain. Tests were also conducted to see if multiple samples could be dehydrated and weighed sequentially. Rehydration curves of 43 polymers and pyrolytic graphite were obtained. This information was used to determine the best pre-flight, and post-flight, mass measurement procedures for the MISSE 2 PEACE Polymers experiment, and for subsequent NASA Glenn Research Center MISSE polymer flight experiments.
Document ID
20190001084
Document Type
Technical Memorandum (TM)
Authors
de Groh, Kim K. (NASA Glenn Research Center Cleveland, OH, United States)
McCarthy, Catherine E. (Hathaway Brown School Shaker Heights, OH, United States)
Kshama, Girish M. (Hathaway Brown School Shaker Heights, OH, United States)
Banks, Bruce A. (Science Applications International Corp. (SAIC) Cleveland, OH, United States)
Kaminski, Carolyn (Hathaway Brown School Shaker Heights, OH, United States)
Youngstrom, Erica E. (Hathaway Brown School Shaker Heights, OH, United States)
Lillis, Maura (Hathaway Brown School Shaker Heights, OH, United States)
Youngstrom, Christiane A. (Hathaway Brown School Shaker Heights, OH, United States)
Hammerstrom, Anne M. (Hathaway Brown School Shaker Heights, OH, United States)
Hope, Stephanie (Hathaway Brown School Shaker Heights, OH, United States)
Marx, Laura M. (Hathaway Brown School Shaker Heights, OH, United States)
Date Acquired
March 1, 2019
Publication Date
February 1, 2019
Subject Category
Spacecraft Design, Testing and Performance
Report/Patent Number
GRC-E-DAA-TN64510
NASA/TM-2019-220063
E-19653
Funding Number(s)
CONTRACT_GRANT: SAA3-1414
WBS: WBS 228556.04.21.22
CONTRACT_GRANT: NNC12BA01B
CONTRACT_GRANT: SAA3-358
Distribution Limits
Public
Copyright
Public Use Permitted.

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