摘要
以乙二醇或1，3-二氯-2-丙醇为起始剂，1，2-二氯乙烷为溶剂，分别以三氟化硼乙醚络合物（Et2O·BF3）、无水四氯化锡（SnCl4）／三氟乙酸（CF3COOH）共催化体系为催化剂，进行环氧氯丙烷阳离子开环聚合，合成了相对分子质量在600—1100之间、分布窄的端羟基聚环氧氯丙烷（PECH），探讨了起始剂和催化剂的类型、用量对合成反应的影响。结果表明，以1，3-二氯-2-丙醇为起始剂，以1，2-二氯乙烷为溶剂且体积分数约为44％，摩尔分数为0．1％的Et2O·BF3作催化剂，在0℃下反应3h，PECH收率大于90％。
The PECH of the relative molecular mass between 600 to 1100 and narrow distribution was synthesized with ethylene glycol or 1,3-dichloro-2-propanol as initiator, 1,2-dichloroethane as solvent, Et2O·BF3 or SnCl4/CF3COOH as catalysts by cationic ring-opening polymerization of epichlorohydrin. The type and dosage of initiator and catalyst were discussed. The results showed that yield of product was more than 90% when 1,2-dichloroethane as solvent which volume fraction was 44%, Et2O·BF3 as catalyst and its content was 0.1%, reaction temperature was 0℃, reaction time was 3 h.
出处
《聚氨酯工业》
2008年第1期42-45,共4页
Polyurethane Industry
关键词
聚环氧氯丙烷
合成
表征
polyepichlorohydrin
synthesis
characterization
