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对环氧乙烷开环聚合制备聚氧化乙烯反应的氨钙催化剂进行研究。采用正交实验法,考察了m(氨)∶m(钙)、m(乙腈)∶m(钙)、m(环氧丙烷)∶m(钙)、氨钙反应时间、改性剂反应时间等制备因素对聚氧化乙烯相对分子质量(简称分子量,下同)和聚合收率的影响,得到乙腈和环氧乙烷添加量是主要影响因素,并优化得到可用于工业化应用的催化剂制备条件。工业化实验结果表明,聚氧化乙烯产品聚合收率高于98%,产品黏均分子量在2×105~8×105可调。
The open-loop polymerization of ethylene oxide to prepare polyoxyethylene reacted ammonia calcium catalyst was studied. Orthogonal experiment was used to investigate the effects of m (ammonia): m (calcium), m (acetonitrile): m (calcium), m (propylene oxide) And other factors on the molecular weight of polyethylene oxide (molecular weight, the same below) and polymerization yield, the amount of acetonitrile and ethylene oxide is the main influencing factors, and optimize the catalyst can be used for industrial applications Preparation Conditions. The results of industrialization show that the polymerization yield of polyoxyethylene product is higher than 98% and the viscosity average molecular weight of the product is adjustable from 2 × 105 to 8 × 105.