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采用三维键涨落模型 (BFM)的MonteCarlo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2 HNMR谱 .讨论了排除体积效应与链的均方末端距分布对2 HNMR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2 H谱劈裂的影响是不同的 ,较小均方末端距的链决定2 H谱劈裂 ,而较大均方末端距的链使2 H谱产生长的拖尾 .采用BFM计算机模拟与2 HNMR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 .
The HNMR spectra of two oriented oriented polymers with high orientation and low orientation chains were simulated by Monte Carlo computer simulation of three-dimensional bond fluctuation model (BFM) The results show that the effect of volume exclusion on the 2 H-spectrum cleavage of high-orientation and low-orientation polymers is different, and the smaller H-chain ends determine the 2 H-spectrum cleavage, While the larger mean-square end-to-end chain gives a long tail of <2> H spectrum.The combination of BFM computer simulation and 2 HNMR experiments is a powerful tool to study the microstructure of stretched oriented polymer network.