高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (1): 134.

• 论文 • 上一篇    下一篇

NMR研究HDI与水的加成产物N-100结构

罗善国1, 谭惠民1, 张建国2, 吴亦洁2, 景凤英2, 孝延文2, 裴奉奎2   

  1. 1. 北京理工大学化工与材料学院, 北京, 100081;
    2. 中国科学院长春应用化学研究所, 长春, 130022
  • 收稿日期:1996-01-09 出版日期:1997-01-24 发布日期:1997-01-24
  • 通讯作者: 张建国.
  • 作者简介:罗善国, 男, 26岁, 博士研究生.
  • 基金资助:

    国家“863”计划基金

The Structure Analysis and Characterization of N-100 by NMR

LUO Shan-Guo1, TAN Hui-Min1, ZHANG Jian-Guo2, WU Yi-Jie2, DING Feng-Ying2, XIAO Yan-Wen2, PEI Feng-Kui2   

  1. 1. School of Chemical Engineering &, Materials Science, Beijing Institute of Technology, Beijing, 100081;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022
  • Received:1996-01-09 Online:1997-01-24 Published:1997-01-24

摘要: 用NMR研究了六次甲基二异氰酸酯与水的加成产物N-100的结构.结果表明:N-100中含有脲基、缩二脲基、双缩二脲基、三聚体异氰脲基、异氰酸酯和氨基等基团,是一种以氢原子为交联点、胺和异氰酸酯为端基的具有复杂网络结构的多异氰酸酯.一维核磁谱及二维化学位移相关谱不但分辨出4种羰基,还确定了氮上5种不同取代结构的分子链连接情况.通过建立理论模型,准确地定量描述了N-100的网络结构.

关键词: N-100, 结构分析与表征, 核磁共振, 六次甲基二异氰酸酯, 固化剂

Abstract: To improve the mechanics properties of polyurethane materials at a high or low temperature, a hydroxy compound N-100 of HDIwas synthesized.The structure analysis and characterization were made by NMR (1H, 13C, 1H-1H COSY, 13C-1H COSY).In addi-tion, quantitative description of the network was made on the basis of some ideal assump-tions.1Dand 2D NMRcan differentiate four sorts of carbonyl groups and establish the con-nections of all carbon and hydrogen atoms of mixed structures that originated from five dif-ferent substitutions.Besides, the alkene and isocyanate, urea, biuret and trimerized isocya-nuric groups were also detected.Therefore, the structure of N-100 was suggested be a poly-isocyanate with complicated network which contained nitrogen atom as cross-linkage, iso-cyanate and alkene as end groups.The consistence of calculated values with tested values of isocyanate content, mean function degree and mean molecular weight demonstrated the cor-rect of structure characterization and the validity of network description.

Key words: N-100, Structure analysis and characterization, 1D NMR (1H,13C), HDI, Curing agent

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