波谱学杂志 ›› 1986, Vol. 3 ›› Issue (4): 369-375.

• 研究论文 • 上一篇    下一篇

1,2-聚丁二烯的固态13C-NMR线宽与自由体积

倪少儒1, 余赋生1, 沈联芳2, 钱保功2   

  1. 1 中国科学院长春应用化学研究所, 长春;
    2 中国科学院武汉物理研究所, 武汉
  • 收稿日期:1986-06-13 修回日期:1986-07-25 出版日期:1986-12-05 发布日期:2018-01-23
  • 基金资助:
    中国科学院院内科学基金资助课题

SOLID-STATE CARBON-13 NMR LINEWIDTH AND FREE VOLUME IN 1,2-POLYBUTADIENES

NI Shaoru1, Yu Fusheng1, Shen Lianfang2, Qlan Baogong2   

  1. 1 Changchun Instiute of Applied Chemistry, Academia Sinica, Changchun;
    2 Wuhan Institute of Physics, Academia Sinica, Wuhan
  • Received:1986-06-13 Revised:1986-07-25 Online:1986-12-05 Published:2018-01-23

摘要: 本工作测定了一系列1,2-聚丁二烯样品在不同温度下的固态13C-NMR线宽,研究了线宽对链结构和温度的依赖性;发现在一定的温度范围内,线宽与温度的关系符合WLF方程,这表明高聚物的NMR弛豫不仅取决于分子结构,也与自由体积有关。自由体积理论在NMR弛豫中也是适用的。

Abstract: Solid-state carbon-13 NMR linewidth of 1,2-polybutadienes with various contentsof 1,2-units were measured over a temperature range from-50℃ to 50℃. The structure and temperature dependences of the linewidth have been investigated. It is found that the NMR relaxation in polymers is dependent not only on the chain structure but also on the free volume. The free volume theory is also applicable to the NMR relaxation in polymers.