Kinetics and mechanism of methyl linoleate oxidation in cetyltrimethylammonium bromide micelles

A change in the number of micelles was found to affect the kinetics of oxygen absorption of the entire microheterogeneous system, primarily the type of chain termination (310 K) as evidenced by the results of the study of the oxidation of methyl linoleate (LH) in cetyltrimethylammonium bromide (CTAB) micelles. Mixed micelles are formed, and the probability of isomerization and decomposition of peroxyl radicals of the substrate (LO2•) with the formation of HO2• increases. Given the hydrophilic character of HO2•, it can be assumed that these radicals diffuse to the aqueous phase to a higher extent, whereas the disproportionation in the organic phase is less pronounced. This leads to a decrease in the chain termination rate, which is kinetically described as a formally linear chain termination. As a result, the LH oxidation rate in CTAB micelles increases.