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Syntheses and Degradations of Fluorinated Heterocyclics3-Perfluoroalkylether-5-perfluoro-n-heptyl-1,2,4-oxadiazole and 3,S-bis(perfluoroalkylether)-1,2,4-oxadiazole were synthesized and characterized. The 3, 5-bis(perfluoroalkylether)-l, 2,4-oxadiazole was subjected to thermal, thermal oxidative, and hydrolytic degradations at 235 and 325 C and was found to be stable under these conditions as evidenced by practically quantitative recovery of the test samples. In the presence of Jet-A fuel at 235 C a low degree of degradation, approximately 4%, was observed. 3,5-Bis(perfluoro-n-heptyl)-1,2,4-oxadiazole was found to be stable to attack by water at 325 C; however in air in the presence of jet-A at 235 C the extent of degradation was in excess of 10%.
Document ID
19990054143
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Paciorek, K. J. L.
(Ultrasystems, Inc. Irvine, CA United States)
Kratzer, R. H.
(Ultrasystems, Inc. Irvine, CA United States)
Kaufman, J.
(Ultrasystems, Inc. Irvine, CA United States)
Nakahara, J. H.
(Ultrasystems, Inc. Irvine, CA United States)
Rosser, R. W.
(NASA Ames Research Center Moffett Field, CA United States)
Parker, J. A.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1977
Publication Information
Publication: Journal of Fluorine Chemistry
Publisher: Elsevier Sequoia S.A.
Volume: 10
Subject Category
Chemistry And Materials (General)
Funding Number(s)
CONTRACT_GRANT: NAS2-7981
Distribution Limits
Public
Copyright
Other

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