高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (5): 520.

• 研究论文 • 上一篇    下一篇

用加脉冲梯度场的NMR自旋回波法测量高分子聚合过程中的自扩散系数

胡洊, 徐玉书, 许静, 姜殿武, 崔海峰   

  1. 吉林大学原子与分子物理所
  • 收稿日期:1988-09-24 出版日期:1989-05-24 发布日期:1989-05-24
  • 通讯作者: 徐玉书

Self-Diffusion Coefficients of Polymer in Polymerization Measured with Pulsed Field-Gradient NMR Spin Echo Methods

Hu Jian, Xu Yushu, Xu Jing, Jiang Dianwu, Chui Haifeng   

  1. The Atomic and Molecular Physics Institute. Jilin University, Changchun
  • Received:1988-09-24 Online:1989-05-24 Published:1989-05-24

摘要: 通过扩散系数的测量,可以了解高分子聚合反应整个过程的机理,进而控制聚合反应的进程。但能够测量高分子聚合过程中自扩散系数变化的仪器并不多。当前,加脉冲梯度场的自旋回波法被认为是最为有效和实用的方法[1],此项研究围内尚未报道。

关键词: 核磁共振, PMMA, 自扩散系数

Abstract: Aexperiment set for measuring self-diffusion coefficients of polymer in polymerization with a pulsed Field-Gredient NMR Spin Echo method is described. The self-diffusio coefficients produced from little molecules in polymerization from MMAto PMMAinitiated by AIBNwere measured with this set. The lowest value of the coefficients is D= 9.04 × 10-9 cm2·s-1.

Key words: Self-diffusion coefficient, PMMA, Pulsed field-gradient NMR spin echo

TrendMD: