P(St-MMA)聚合物在CDCl_3溶剂中的核磁共振弛豫及高分子链运动

The study on NMR relaxation and the chains movement of P(St-MMA)Polymer in CDCl_3 Solution

采用1H,13C核磁共振技术,分别指认了P(St-MMA)聚合物氢谱、碳谱的各个信号,并通过对P(St-MMA)共聚物在CDCl3溶剂中变温13C-NMR和1H-NMR弛豫时间的测量,证实了溶液中甲基丙烯酸甲酯—苯乙烯共聚物体系中高分子链间的凝聚缠结结构的存在,并分析了缠结对温度的依赖性。

The P（St-MMA）polymer was studied by ^1H-NMR and ^13C-NMR and all the signal were assigned. And then, the relaxation time of ^1H-NMR and ^13C-NMR were used to prove the copolymer of P （St-MMA） exists the cohesional entangle and disentanglement structure simultaneously dissolved in CDCl3 in different temperature. This is the characteristic of the macromolecules in solution. Finally, the entangle dependent on temperature was analysized.