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NMR and Infrared Study of Thermal Oxidation of cis-1, 4-PolybutadieneA study of the microstructural changes occuring in CB during thermal, uncatalyzed oxidation was carried out. Although the oxidation of CB is accompanied by extensive crosslinking with attendant insolubilization, it was found possible to follow the oxidation of solid CB directly with C-13 NMR spectroscopy. The predominant products appearing in the C-13 NMR spectra of oxidized CB are epoxides. The presence of lesser amounts of alcohols, peroxides, and carbonyl structures was adduced from complementary infrared and NMR spectra of soluble extracts obtained from the oxidized, crosslinked CB. This distribution of functional groups contrasts with that previously reported for the autooxidation of 1,4-polyisoprene. The difference was rationalized in terms of the relative stabilities of intermediate radical species involved in the autoxidation of CB and 1,4-polyisoprene.
Document ID
19990054407
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Gemmer, Robert V.
(National Academy of Sciences - National Research Council Moffett Field, CA United States)
Golub, Morton A.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1978
Publication Information
Publication: Applications of Polymer Spectroscopy
Publisher: Academic Press, Inc.
ISBN: 0-12-125450-X
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Other

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