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Rate constants of oxidation of unsaturated fatty esters studied by chemiluminescence

Article dans une revue avec comité de lecture
Author
AUDOUIN, Ludmila
VERDU, Jacques
MATISOVÁ-RYCHLÁ, Lyda
RYCHLY, Jozef
ccFAYOLLE, Bruno
666 Aménagement, Développement, Environnement, Santé et Sociétés [ADES]
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ccRICHAUD, Emmanuel

URI
http://hdl.handle.net/10985/9912
DOI
10.1016/j.chemphyslip.2012.09.002
Date
2012
Journal
Chemistry and Physics of Lipids

Abstract

This study deals with oxidation kinetics of three unsaturated fatty esters: methyl oleate, methyl linoleate and methyl linolenate at temperatures ranging from 90 to 150 °C. The reaction was monitored by chemiluminescence. A kinetic model was derived from a simple mechanistic scheme, in which initiation is due to hydroperoxides decomposition, whereas propagation results from the abstraction of the most labile hydrogen and termination results only from the bimolecular combination of peroxyl radicals. Analysis of induction period duration indicated that hydroperoxides mainly decompose by a bimolecular process. The model well predicts the main features of the experimental chemiluminescence curves. Kinetic parameters of the three unsaturated fatty esters were assessed from inverse method and discussed.

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