波谱学杂志 ›› 2004, Vol. 21 ›› Issue (2): 165-173.

• 研究论文 • 上一篇    下一篇

拉伸取向聚合物2H NMR谱的键涨落模型Monte Carlo模拟

隋娜娜1,  孙平川2,  陈铁红3,  林 海2,  李宝会1*,  金庆华1,  丁大同1   

  1. 南开大学 1.物理学院,2.吸附分离功能高分子材料国家重点实验室,3.化学学院,天津 300071
  • 收稿日期:2003-12-01 修回日期:2004-01-09 出版日期:2004-06-05 发布日期:2004-06-05
  • 基金资助:

    国家自然科学基金资助项目(20274020, 20374031, 20373029)

DEUTERIUM NMR SPECTRA OF STRAINED POLYMERS:  A MONTE CARLO SIMULATION USING BOUND FLUCTUATION MODEL

 SUI Na-Na1, Sun-Ping-Chuan2, Chen-Tie-Hong3, Lin- Hai2, Li-Bao-Hui1*, Jin-Qiang-Hua1, DING Da-Tong1   

  1. 1.Department of Physics,2.State Key Laboratory of Functional Polymer Materials for Adsorption and Separation,3.College of Chemistry, Nankai University,Tianjin 300071, China
  • Received:2003-12-01 Revised:2004-01-09 Online:2004-06-05 Published:2004-06-05
  • Supported by:

    国家自然科学基金资助项目(20274020, 20374031, 20373029)

摘要:

采用三维键涨落模型(BFM)的Monte Carlo计算机模拟方法,模拟了两种分别具有高取向和低取向链微观结构的拉伸取向聚合物2H NMR谱. 讨论了排除体积效应与链的均方末端距分布对2H NMR谱线的影响. 结果表明,排除体积效应对高取向和低取向聚合物2H谱劈裂的影响是不同的,较小均方末端距的链决定2H谱劈裂,而较大均方末端距的链使2H谱产生长的拖尾. 采用BFM计算机模拟与2H NMR实验的结合是研究拉伸取向聚合物网络微观结构的有力手段.

关键词: 2H NMR谱, 拉伸聚合物, 键涨落模型, Monte Carlo模拟

Abstract:

Deuterium NMR spectra of strained polymers was simulated using Monte Carlo simulations with the bond fluctuation model. The excluded volume (EV) effect and the effect of mean-square end-to-end distance on the spectra were discussed. It is shown that the EV effect on the spectra of highly and lowly oriented polymers are different. The splitting of the spectrum is attributed to chains with short mean-square end-to-end distance, whereas chains with long mean-square end-to-end distance will lead to broadening and wings of the spectrum.

Key words: Monte Carlo simulation, 2H NMR, strained polymers, bond fluctuation model

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