论文部分内容阅读
前报中已证明用三氟化硼-环氧氯丙烷(ECH)引发四氢呋喃(THF)聚合具有较高的引发效率,并对在Ac_2O、水和无水存在下的聚合反应进行了研究。本文报道1,4-丁二醇(BG)对BF_3引发THF聚合反应的影响。通常认为在BG存在下,BF_3是不能引发THF聚合的,但本工作证明BG是有效的分子量调节剂,制备分子量在
It has been reported in the previous reports that the polymerization of tetrahydrofuran (THF) initiated with boron trifluoride-epichlorohydrin (ECH) has a high initial efficiency and the polymerization reaction in the presence of Ac 2 O, water and water has been studied. This article reports the effect of 1,4-butanediol (BG) on BF 3 -induced THF polymerization. It is generally believed that BF3 can not initiate polymerization of THF in the presence of BG but this work demonstrates that BG is an effective molecular weight regulator for the preparation of