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中文摘要：
以对苯二甲酸二甲酯（DMT）与乙二醇（EG）为原料，采用离子液体为催化剂，在无溶剂体系中合成聚对苯二甲酸乙二醇酯（PET）．实验结果指出，当原料配比n（EG）：n（DMT）=2：1，反应温度为150℃，离子液LMS-4的用量为3．5％（g／gDMT）时，聚合物产率可达到94．1％，分子量Mw保持在2000左右．底物配比和催化剂用量等因素对产物分子量有一定影响．同时，对可能发生的反应历程进行了推测．
英文摘要：
Poly ethylene terephthalate （PET） is synthesized by means of catalysis of ionic liquids in solvent-free system, using dimethyl terephthalate （DMT） and ethylene glycol （EG） as material. The experiment results show that the product yield of PET is 94.1% and the Mw is about 2 000 when the mol ratio of n（EG） ： n （DMT） is 2/1, reaction temperature at 150 ℃ , and the dosage of ionic liquids is 3.5% （g/g DMT）. The factors of the material proportion and the catalyst dosage have effect on the molecular weight of polymer. The possible reaction process is presumed well- founded in the study.
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