Stabilization of polypropylene against γ-initiated oxidation : Stabilizer attack during radiolysis

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DOIResolve DOI: http://doi.org/10.1016/0141-3910(92)90123-M
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TypeArticle
Journal titlePolymer Degradation and Stability
Volume38
Issue3
Pages265269; # of pages: 5
AbstractThe destruction of additives in γ-irradiated polypropylene films has been measured by infrared and electron spin resonance spectroscopy immediately after irradiation. Hindered amine or hindered phenol additives containing the ester group [>CH---O---C(=O)---CH₂~] were found to undergo ester destruction. Hindered amines containing the >CH~O---C(=O)---C--- group were not attacked. Phenols showed extensive loss of the phenolic ---OH group, presumably by peroxyl radical attack. Irradiation under conditions where peroxyl radicals were not formed or were scavenged competitively by the presence of a phenol prevented or reduced attack on the reactive ester linkage in hindered amines. It is possible that peroxyl radical attack is occurring at the ---CH₂--- group α to the carbonyl, which is known to be activated towards oxidation.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedYes
NRC number32946
NPARC number14500474
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Record identifier91b05326-efd8-437f-b65f-fe97c7bebed0
Record created2010-03-01
Record modified2016-05-09
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