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利用过氧化叔丁基、过氧化苯甲酰或偶氮异丁腈为引发剂,进行乙烯与乙酸甲酯的调节聚合反应,实验结果说明其中以过氧化叔丁基效率最佳,余二者均较差。过氧化叔丁基以1.5％用量,调聚物的平均收率可达加入酯的14％。三种引发剂的用量在0.12％至4.6％的范围内改变,调聚物收率的增加与引发剂用量的增加几成直线关系。由过氧化叔丁基引发的调聚产物中,分离并鉴定月桂酸、软脂酸、硬脂酸及二十酸等四种高极脂肪酸。除调聚酯外,尚含相当量不水解的中性物。由偶氮异丁腈引发的反应液中,分离出引发剂自由基的二聚体1,1,2,2-四甲基丁二腈,其量几占加入引发剂量55％。
The use of t-butyl peroxide, benzoyl peroxide or azoisobutyronitrile as initiator, the polymerization of ethylene and methyl acetate polymerization, the experimental results show that the most efficient tert-butyl peroxide, the remaining two Are poor. The t-butyl peroxide was present in an amount of 1.5% and the average telomer yield was up to 14% of the ester added. The amounts of the three initiators varied from 0.12% to 4.6%. The increase in telomer yield was linear with the increase in the amount of initiator. In the telomerization products induced by t-butylperoxide, four kinds of high-fat fatty acids such as lauric acid, palmitic acid, stearic acid and arachidic acid were isolated and identified. In addition to polyester, but also contains a considerable amount of non-hydrolyzed neutrals. In the reaction solution initiated by azoisobutyronitrile, the dimer 1,1,2,2-tetramethylbutadienitrile was separated from the initiator radical in an amount of 55% of the initiator.