The Influence of some Chain-Breaking Antioxidants on Thermal-Oxidative Decomposition of Linolenic Acid |
| |
Authors: | Litwinienko G. Kasprzycka-Guttman T. |
| |
Affiliation: | (1) Department of Chemistry, University of Warsaw, ul. L. Pasteura 1, 02-093 Warsaw, Poland |
| |
Abstract: | Thermoxidation of linolenic acid inhibited by addition of 2,6-di-t-butyl-4-methylphenol and 2,4,6-trimethylphenol at various concentrations was investigated. The measurements were carried out under non-isothermal conditions in an atmosphere of oxygen. DSC curves permitted the determination of onset point and maximum points of the peaks. The influence of inhibitor concentration on temperature of the start of oxidation was noticed. However, no significant changes in temperatures of the maximum heat flow was observed. Measurements and calculations described in this report prove that the assessment of the antioxidant activity of chain-breaking inhibitors can be performed only from the onset temperatures. Calculations of the activation energy of inhibited linolenic acid thermoxidation were performed in order to elucidate the antioxidant activity of the phenolic compounds. This revised version was published online in August 2006 with corrections to the Cover Date. |
| |
Keywords: | antioxidants DSC thermoxidation |
本文献已被 SpringerLink 等数据库收录! |
|