应用化学 ›› 1991, Vol. 0 ›› Issue (2): 94-96.

• 研究简报 • 上一篇    下一篇

用三氟化硼引发体系制备聚丁二醇

张阿方1,2, 张鸿志1, 杨惠昌1,2, 冯新德1   

  1. 1. 河南化学研究所, 郑州;
    2. 北京大学化学系, 北京 100871
  • 收稿日期:1990-03-16 修回日期:1990-11-12 出版日期:1991-04-10 发布日期:1991-04-10

PREPARATION OF POLYTETRAMETHYLENE GLYCOL BY BF3 SYSTEM

Zhang Afang1,2, Zhang Hongzhi1, Yang Huichang1,2, Feng Xinde1   

  1. Department of Chemistry, Peking university, Beijing 100871
  • Received:1990-03-16 Revised:1990-11-12 Published:1991-04-10 Online:1991-04-10

摘要: 分子量在3000以下特别是1000或2000的聚丁二醇(PTMG)是制备嵌段聚醚聚氨酯及嵌段聚醚聚醋弹性体的重要软段原料。用三氟化硼(BF3)体系引发制备PTMG巳有报道[1,2],但尚难在工业上采用,主要是引发效率低。前已报道,BF3-环氧氯丙烷(ECH)体系的引发效率比BF3-环氧乙烷(EO)体系高2.5~6倍[3],比BF3-环氧丙烷(PO)体系高2~3倍[4]。本文用BF3-ECH为引发体系,并用水为分子量调节剂制备分子量1000或2000的PTMG,测定了链组成,并与二异氰酸酯反应制得了分子量与机械性能高的嵌段聚醚聚氨酯.

关键词: 四氢呋喃, 聚丁二醇, 三氟化硼, 开环聚合, 阳离子聚合

Abstract: The effects of water on the molecular weight and yield of polytetramethylene glycol(PTMG) prepared from tetrahydrofuran by using BF3-etherate and epichlorohydrin(ECH)asinitiator system were studied.The high yield of of PTMG with controlled average molecularweight of 1000~2000 can be obtained by delating the time of adding water.The once-through yield was around 60~80% and the ultimate yield reached 90% for PTMG of mole-cular weightaround 2000.The segmented polyurethane with high mechanical propertieswas prepared thereby.

Key words: tetrahydrofuran, polytetramethylene glycol, boron fluoride, ring opening polymerization, cationic polymerization