以碳酸乙二酯、1,4-丁二醇和1,6-己二醇为原料,醋酸锌、硝酸锌为催化剂,考察了反应温度、反应时间等条件对碳酸乙二酯与二元醇反应的影响,制备出结构规整的以β-羟乙基、ω-羟烷氧基为端基的聚碳酸酯二元醇。产物经核磁共振波谱表征,1,4-丁二醇反应的聚碳酸酯二元醇的数均分子量为300-560,产物中由脱羰基反应形成的醚键链段含量可小于3%,1,6-己二醇反应的聚碳酸酯二元醇的数均分子量为700-980,产物中醚键链段含量可降低至0.24%。最后探讨了碳酸乙二酯与二元醇的反应机理。
A series of linear aliphatic polycarbonate diols （APC） with defined structure were synthesized by using ethylene carbonate （EC）, 1,4-butanediol, and 1,6-hexanediol as the raw materials promoted by zinc acetate or zinc nitrate. The effect of reaction temperature, time and the amount of catalyst on the structure and number average molecular weight of polycarbonate was investigated. The structures and number average molecular weight were characterized and calculated by means of NMR spectroscopy. The number average molecular weight （Mn） of polycarbonate with l]-hydroxylethyl and/or c0-hydroxylalkyl as end groups is in range of 300 to 560 for reaction of 1, 4-butanediol and 700 to 980 for reaction of 1,6-hexanediol. The ether unit from the reaction of 1,4-butandiol can be less than 3%（mol）. While the ether unit from the reaction of 1,6-hexandiol can be less up to 0.24% （tool）. The reaction mechanism of ethylene carbonate with diol is proposed.
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