高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (11): 2202.

• 综合评述 • 上一篇    

由A2和CB2型单体合成端羟基超支化聚(脲-氨酯)

高超, 颜德岳   

  1. 上海交通大学化学化工学院, 上海200240
  • 收稿日期:2002-05-09 出版日期:2002-11-24 发布日期:2002-11-24
  • 通讯作者: 颜德岳(1937年出生),男,教授,博士生导师,主要从事高分子化学及物理研究.
  • 基金资助:

    国家自然科学基金(批准号:29974017);上海交通大学博士启动基金资助

Preparation of Hyperbranched Poly（urea-urethane） with Hydroxyl End-groups from A2 and CB2 Type Monomers

GAO Chao, YAN De-Yue   

  1. College of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2002-05-09 Online:2002-11-24 Published:2002-11-24

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关键词: 超支化聚(脲-氨酯), 二异氰酸酯, 二乙醇胺

Abstract: Hyperbranched polymer with alternating ureido and urethano units was prepared by direct polymerizarion of isophorone diisocyanate(IPDI, A2) with diethanolamine(DEOA, CB2) in the absence of catalyst. In the reaction, one isocyanato group of IPDI reacts fast with amino group of DEOA, generating an intermediate with one isocyanato group and two hydroxyl groups. Now the intermediate formed is a new kind of AB2 type monomer. Further self-condensation of this AB2 species leads to hyperbranched poly(urea-urethane). The reaction mechanism was characterized with in situ FTIR. Temperature and concentration have great influence on the polymerization process. When the feed ratio of IPDI to DEOA is equal to 1∶1, no gelation is observed if the reaction temperature within initial several hours is lower than 20 ℃. Cross-linking would occur if the reaction temperature during initial period is high. The degree of branching(DB) of the resulting hyperbranched poly(urea-urethane) is 46.5%-48.5%.

Key words: Hyperbranched poly(urea-urethane), Diisocyanate, Diethanolamine

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