Abstract: C22-tricarboxylic dibutyl monomethyl ester was synthesized from waste oil fatty acid methyl esters and identified by infrared spectroscopy and HPLC-MS，its content reached 94.0% after purified by molecular distillation. The physicochemical properties of the product were investigated，and the mechanical properties and electrical properties of its plasticized PVC materials were also studied. Comparing with DOP，the product has higher flash point and lower heating loss. The mechanical properties，electrical properties and anti-aging properties of the PVC materials plasticized with C22-tricarboxylic dibutyl monomethyl ester are also superior to those plasticized with DOP. Lastly，toxicities of the product and DOP were tested by nematode experiments. The results revealed that the toxicity of C22-tricarboxyllic dibutyl-monomethyl ester on nematode is lower than that of DOP.

Key words: C22-tricarboxyllic dibutyl-monomethyl ester, dioctyl phthalate, plasticizer, synthesis, separation

摘要： 以废弃油脂脂肪酸甲酯为主要原料合成了C22-三元酸二丁一甲酯，产物经分子蒸馏分离提纯后加成物含量达到94.0%，并采用红外光谱和液质联用技术对产物结构进行了研究。对C22-三元酸二丁一甲酯的若干理化性能及其增塑PVC材料的各项性能与邻苯二甲酸二(2-乙基己基)酯（DOP）进行了比较测试。结果表明：C22-三元酸二丁一甲酯的闪点明显高于DOP，加热减量明显小于DOP；其增塑的PVC拉伸强度等力学性能、电绝缘性能和抗老化性能均优于DOP增塑的PVC材料。最后采用线虫实验比较了C22-三元酸二丁一甲酯和DOP的毒性大小，结果C22-三元酸二丁一甲酯对线虫的毒性小于DOP。

关键词: C22-三元酸二丁一甲酯, 邻苯二甲酸二(2-乙基己基)酯, 增塑剂, 合成, 分离