四氢呋喃开环均聚以及四氢呋喃和环硫氯丙烷共聚新催化体系

NEW CATALYTIC SYSTEM FOR RING OPENING POLYMERIZATION OF TETRAHYDROFURAN AND COPOLYMERIZATION OF TETRAHY DROFURAN WITH CHLOROMETHYLTHIIRANE

研究发现无水稀土氯化物５０％发烟硫酸体系是四氢呋喃（ＴＨＦ）均聚和四氢呋喃与环硫氯丙烷（ＣＭＴ）共聚合的优良新催化体系．考察了ＴＨＦ均聚反应特征，在合适条件下，ＴＨＦ聚合以６５％转化率制得粘均分子量达１０，０００～１５，０００的白色聚四氢呋喃（ＰＴＨＦ）固体．端羟基分析法测得聚合物的分子链两端均为羟基．考察了影响ＴＨＦＣＭＴ共聚合反应诸因素，如聚合温度和时间、两单体的比例等，制得数均分子量为１，０００左右的淡黄色粘性固体共聚物．

A new catalytic system composed of anhydrous rare earth chloride and 50% fuming sulfuric acid has been developed for the homopolymerization of tetrahydrofuan (THF) and the copolymerization of THF with chloromethyl thiirane (CMT).The polymerization characteristics of THF were examined.White solid PTHF with high conversion of 65% and high viscosity molecular weight of 10,000～15,000 can be obtained at 0 to -15℃ in about 5 hour.The molecular chain of PTHF has average two hydroxyl groups.The effects of copolymerization parameters such as temperature,duration and comonomer ratio on the copolymerization of THF with CMT were studied.