一缩二丙二醇二丙烯酸酯的合成及表征

Synthesis and Characterization of Dipropyleneglycol Diacrylate

以SO42-/ZrO2固体超强酸作为催化剂,酯化合成一缩二丙二醇二丙烯酸酯(DPGDA)。通过正交实验确定酯化反应的最佳条件:催化剂用量为8 g/100 g丙烯酸,一缩二丙二醇(DPG)/丙烯酸物质的量的比为2.6∶1.0,反应温度是114℃,带水剂(甲苯)的量为68 g/100 g丙烯酸,反应时间为4 h。以此工艺条件所得到的DPGDA的转化率稳定在93%以上。产品结构经IR表征,证明是所需的产物。

SO42-/ZrO2 solid superacid is used as a catalyst to prepare a DPGDA.The optimal condition of esterification was studied by the orthogonal design that the catalyst dosage was 8 g as per 100 g acrylic acid,the molar ratio of acrylic acid to dipropylene glycol(“DPG”)was 2.6∶1.0,the reaction temperature was 114℃,the amount of water-carrying agent was 68 g toluene as per 100 g acrylic acid,and the reaction time was 4h.Under this condition,the conversion rate of DPGDA stabilized at 93%and more.It is proved to be the target product by the characterization of IR.