高等学校化学学报

高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (8): 1300.

• 论文 • 上一篇    下一篇

固体变温高分辨核磁共振碳谱研究聚氨酯型热致液晶高聚物

陈群1, 杨光1, 王源身1, 余学海2, 黑子弘道3, 安藤勋3   

  1. 1. 华东师范大学分析测试中心, 上海 200062;
    2. 南京大学高分子系;
    3. 东京工业大学高分子工学科, 东京152, 日本
  • 收稿日期:1995-09-19 出版日期:1996-08-24 发布日期:1996-08-24
  • 通讯作者: 陈群,男,32岁,博士,副教授.
  • 作者简介:陈群,男,32岁,博士,副教授.
  • 基金资助:

    国家教育委员会留学归国人员科研启动基金

Solid-state High-resolution Variable-temperature 13C NMR Shudy on HDI Based Main-chain Liquid Crystalline Elastomer

CHEN Qun1, YANG Guang1, WANG Yuan-She1, YU Xue-Hai2, Kurosu Hiromichi3, Andi Isao3   

  1. 1. Analytical Center, East China Normal University, Shanghai 200062;
    2. Department of Chemistry, Nanjing University;
    3. Department of Polymer Chemistry, Tokyo Institute of Technologh, Tokyo 152, Japan
  • Received:1995-09-19 Online:1996-08-24 Published:1996-08-24

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被引次数

4

摘要： 对由聚四氟呋喃预聚体、六次亚甲基二异氰酸酯及4,4'-二羟乙氧基联苯按1:3:2的比例用两步法聚合得到的主链型聚氨酯热致液晶聚合物,采用变温固体高分辨核磁共振碳谱方法,在室温到100℃范围内对该样品的聚集态结构、氢键相互作用、分子运动等变化进行了研究。在变温谱中,观察到硬段羰基形成的氢键随温度升高而逐渐解离以及HB2的部分结晶发生次级转变等一些有意义的现象。

关键词: 聚氨酯型热致液晶高聚物, 聚集态结构, 氢键相互作用, 固体变温高分辨核磁共振

Abstract: The solid-state high-resolution variable-temperature13C NMRexperiments(including13C CP/MAS,13C PST/MAS,13C DD/MAS and contact time measurements)were carried out on a main-chain liquid-crystalline polyurethane elastomer based on poly(tetramethylene oxide)(PTMO),hexamethylene diisocyanate(HDI) and 4,4'-bishydroxyethyloxybiphenyl(HB2)from room-temperature to 96℃.The HDIand HB2 segments which play the role of hard segmehts of the elastomer were found to be crystalline.The inter-molecular or inter-segmental hydrogen-bonds formed between the carbonyl group and the NHgroup were found to gradually decompose with the increasing of temperature,Asecondary transition of the HB2 crystal was observed at temperatures well below the meltingpoint of the sample.

Key words: Main-chain liquid crystalline polyurethane elastomer, Morphology structure, Hydrogen-bonding interaction, Solid-state high-resolution variable-temperature 13C NMR

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