不飽和脂肪酸の重合に関する研究 (第4報) : アルミニウムハロゲン化合物の存在下におけるリノール酸メチルの重合反応について

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The polymerization of methyl linoleate in the presence of aluminium halides, AlI3, AlBr3, AlCl3 and AlF3 at 300°C was studied. The result shows that only aluminium iodide among the halides promotes the polymerization. The effects of reaction conditions on the polymerization of methyl linoleate with aluminium iodide were studied further. The main results obtained are as follows : (1) The increase of catalyst concentration at 300°C decreases the time required for the polymer content to reach 70%. (2) As the reaction temperature increased in the polymerization with 2mol% aluminium iodide in 250325°C, the amount of polymer formed was increased. (3) The maximum polymer content of the product under the following reaction condition was about 75%, catalyst concentration 2mol%, reaction temperature 325°C, and reaction time 10hr.<BR>The dimer separated from polymerization product with aluminium iodide was catalytically dehydro-genated. From the results of analyses of the dehydrogenated dimer and other information, it is considered that the polymerization of methyl linoleate with aluminium iodide catalyst involves mainly the Diels-Alder reaction.
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