用质子ＮＭＲ谱对交联凝胶高分子（聚丙烯酰胺－丙烯酸）网络与线型高分子（聚苯乙烯）浓溶液体系的ＮＭＲ线型进行了比较研究。结果表明，两种体系中高分子链段运动具有不同的特征：在充分溶胀的交联凝胶高分子网络中，交联点间的链段运动比较自由，交联点的运动则比较慢，使其质子谱呈现“超洛伦兹”线型；而在线型高分子浓溶液中，缠结点间的链段与缠结点一样，运动并不自由，使谱线呈现出类似固体的宽线宽的高斯线型 NMR spectra of crosslinked gel polymer (polyacrylamide-acrylic acid) networks and linear polymer (polystyrene) concentrated solutions were compared by proton NMR spectroscopy. The results show that the movement of polymer chains in the two systems has different characteristics: in the fully swollen crosslinked gel polymer network, the movement of the link between the crosslinking points is relatively free and the movement of the crosslinking points is relatively slow The proton spectrum shows a “super Lorentz” linear pattern. In the linear polymer solution, the entanglement between the entangled segments is the same as that of the entangled point, and the movement is not free, resulting in a broad solid line Wide gaussian line type