Abstract
The respective oxidation processes of linoleoyl residue esterifies with a variety of hydrophobic substances were measured at 80℃. The relationship between the molecular weight of the hydrophobic substance and the rate of oxidation of linoleoyl residue was investigated. The autocatalytic rate expression was proposed to describe the entire oxidation process of each sample, and rate constants involved in the expression were evaluated. Phenol, 2-naphthol, 1-undecanol, stearyl alcohol and cholestanol were respectively used as the hydrophobic substance, and they synthesized linoleoyl compound with linoleic acid. Linoleic acid, methyl linoleate, ethyl linoleate, isopropyl linoleate and cholesterol linoleate, which available in the market, were also used as the experimental samples in this study. It can be concluded that as the molecular weight of the hydrophobic substance becomes lager, the rate constant tends to become smaller. However, for the molecular weights exceeding 150, the values of the rate constants were found to be similar.
