リノール酸メチルの熱重合に関する研究 (第5報) : アントラキノン添加の場合の熱二量化反応機構の動力学的検討

概要

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Anthraquinone has been recognized as an effective catalyst for the thermal dimerization and the formation of conjugated isomers of methyl linoleate. From the results of analysis of kinetic data obtained, the mechanism of thermal dimerization of methyl Linoleate in the presence of anthraquinone is proposed as follows : The anthraquinone draws off a hydrogen atom from methyl linoleate molecule thus forming the radicals, which in turn produce either dimer by the radical-addition reaction or conjugated isomers of methyl linoleate. Then, the conjugated isomers and the linoleate dimerize by the Diels-Alder reaction, where the trans, trans-conjugated isomer acts as diene, and the trans, trans-, the cis, trans-conjugated isomer or the linoleate act as dienophile. Besides these reactions, the formation of octadecenoate also occurs.