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Glycerol, glucose and 2‐acetoacetoxyethyl methacrylate: Effect on methyl linolenate oxidation and yellowing
Author(s) -
Kumarathasan Rajkumar,
Rajkumar Amirthini B.,
Hunter Norman R.,
Gesser Hyman D.
Publication year - 1992
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/bf02636063
Subject(s) - autoxidation , glycerol , chemistry , methyl methacrylate , linolenate , absorbance , ultraviolet , organic chemistry , photochemistry , chromatography , monomer , materials science , fatty acid , polymer , optoelectronics
The effect of glycerol, glucose and acetoacetoxyethyl methacrylate (AAEM) on autoxidation and yellowing of methyl linolenate has been investigated by nuclear magnetic resonance (NMR) and ultraviolet (UV)‐Visible spectroscopies. The extent of autoxidation was determined by measuring the NMR integration of vinylic protons with respect to methoxy protons, an internal standard, as a function of time. The extent of yellowing was determined by measuring the difference in absorbance at 400 nm and 450 nm as a function of time. Glycerol and AAEM showed inhibition of autoxidation, but the most significant effect was observed with AAEM. Glucose enhanced the autoxidation of methyl linolenate. Inhibition of yellowing was observed with all these compounds, especially with glycerol and AAEM.