聚氧化乙烯合成工艺研究  

Study on synthetic technology of poly(ethylene oxide)

作　　者：李菊梅[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西景德镇333001

出　　处：《石化技术与应用》2008年第2期128-130,共3页Petrochemical Technology & Application

摘　　要：阐述了采用氨钙体系催化剂、以正己烷为溶剂的沉淀聚合制备聚氧化乙烯(PEO)的方法。研究了催化剂用量、反应温度、反应时间及溶剂含水量与PEO收率及其相对分子质量的关系。结果表明,PEO的收率随催化剂用量的增加而增加,其黏均相对分子质量(Mη)则随催化剂用量的增加而降低;反应温度对PEO的收率及其Mη的影响略小;反应时间的延长会使PEO的收率及其Mη增大;溶剂正己烷的含水量会显著降低PEO的收率及其Mη。当反应温度为25～40℃、反应时间为4～6h、催化剂用量为单体质量的1%～2%时,可得到Mη为(3～8)×105的PEO,聚合收率高于80%。Poly(ethylene oxide) (PEO) was synthesized with calcium ammine as catalyst system and hexane as solvent,and the relationship among catalyst amounts,polymerization temperature,polymerization time and moisture of solvent with the yield of PEO and its relative molecular mass were investingated.The results showed that with the increase of catalyst amount,the yield of PEO increased,while the viscosity-average relative molecular mass (M-η) of it decreased.The polymerization temperature had a little effects on the...

关 键 词：聚氧化乙烯 氧化乙烯 开环聚合 相对分子质量 收率 

分 类 号：TQ316.3[化学工程—高聚物工业]