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A differential scanning calorimetry study on the oxidation of C 12 ‐C 18 saturated fatty acids and their esters
Author(s) -
Litwinienko G.,
Daniluk A.,
KasprzyckaGuttman T.
Publication year - 1999
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-999-0156-6
Subject(s) - differential scanning calorimetry , autoxidation , chemistry , stearic acid , isothermal process , lauric acid , palmitic acid , myristic acid , calorimetry , oxygen , organic chemistry , fatty acid , thermodynamics , physics
The autoxidation of lauric, myristic, palmitic, and stearic acids, their ethyl esters, and palmitic and stearic triglycerides was investigated by means of the isothermal and nonisothermal differential scanning calorimetry methods under oxygen flow. The activation energies of oxidation of all investigated compounds were similar (106.0–134.3 kJ/mol) and did not depend on length of the carbon chain. Kinetic parameters of start of the oxidation were similar for each investigated fatty acid and ester. Esterification of carboxyl group did not interfere with the reaction rate. The study showed good agreement between isothermal and nonisothermal data.