环氧乙烷/四氢呋喃共聚醚的合成与表征  

Synthesis and characterization of ethylene oxide/tetrahydrofuran copolyether

作　　者：刘国涛[1] 范晓东[1] 程广文[1] 刘涛[1] 高志亮[1] 刘勤[1] 

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072

出　　处：《中国胶粘剂》2008年第9期5-9,共5页China Adhesives

基　　金：国防科工委"十一五"计划重点项目(J142006A201)

摘　　要：用杂多酸(HPA)引发环氧乙烷(EO)与四氢呋喃(THF)发生共聚反应,从而制得了EO-THF共聚醚[P(EO-THF)]。用红外光谱(FT-IR)、核磁共振(1H NMR)、凝胶渗透色谱-多角度激光散射仪(SEC/MALLS)和差示扫描量热仪(DSC)等仪器对P(EO-THF)的结构进行了表征,并对其聚合机理进行了分析。实验结果表明,HPA作为引发剂可用来制备相对分子质量分布指数小于1.4、平均官能度为2的P(EO-THF);P(EO-THF)的熔点受单体投料比影响较大,当n(EO)∶n(THF)=1∶1时,产物的熔点最低(为-14.28℃);在共聚反应过程中,THF的浓度对共聚反应速率及P(EO-THF)的相对分子质量影响显著,当THF的浓度小于1.39 mol/L时,共聚反应速率较低。A ethylene oxide （EO）/tetrahydrofuran （THF） copolyether[P （E O-THF） ] was synthesized with het- eropolyaeid （HPA） as initiator of EO and THF eopolymerization. The structure of P （EO-THF） was characterized by FT-IR,1H NMR,DSC and size-exclusion chromatography/multi-angle laser light-scattering detector （SEC/ MALLS）,and its polymerization mechanism was analysed. The experiment results indicated that P（EO-THF） which dispersion index of molecular weight was less than 1.4 and the average functionality was about 2 was pre- pared with HPA as initiator. The effect of monomer feeding ratio on melting point of P（EO-THF） was biggish,the melting point of P（EO-THF） was lowest （-14.28 ℃） when molar ratio of EO and THF was 1：1. The effect of THF concentration on reaction rate and molecular weight of P （EO-THF） was obvious in the process of copolymeriza- tion,the reaction rate of copolymerization was lower if the THF concentration was less than 1.39 mol/L.

关 键 词：杂多酸 环氧乙烷 四氢呋喃 环氧乙烷-四氢呋喃共聚醚 相对分子质量 相对分子质量分布 粘合剂 

分 类 号：TQ430.4[化学工程]