An ESR study of the photooxidation of isooctane as a model hydrocarbon, inhibited by the nitroxyl radical TEMPO and its alkyl hydroxylamine ether, has afforded evidence of the existence of dark reactions leading to regeneration of nitroxyl radicals. The characteristics of such reactions support the conclusion that the Denisov cycle is not the dominant mechanism of stabilization by HALS and are in favour of the formation of labile intermediates among which hydroxylamines are probable but not unique candidates.

The mechanism of photostabilization by hindered amines: ESR evidence of dark reactions with regeneration of nitroxyl radicals in the inhibited photooxidation of polyolefin model systems

FAUCITANO, ANTONIO;BUTTAFAVA, ARMANDO;MARTINOTTI, FAUSTA;
1992-01-01

Abstract

An ESR study of the photooxidation of isooctane as a model hydrocarbon, inhibited by the nitroxyl radical TEMPO and its alkyl hydroxylamine ether, has afforded evidence of the existence of dark reactions leading to regeneration of nitroxyl radicals. The characteristics of such reactions support the conclusion that the Denisov cycle is not the dominant mechanism of stabilization by HALS and are in favour of the formation of labile intermediates among which hydroxylamines are probable but not unique candidates.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/468838
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