用自旋－晶格弛豫时间（Ｔ１）研究了溶胀的交联聚丙烯酰胺－丙烯酸网络和线型聚苯乙烯溶液中质子的弛豫行为。交联网络中，随着交联度增大，Ｔ１ＣＨ／Ｔ１ＣＨ２的值由１．１７逐渐趋近于１；而线型聚苯乙烯溶液中，Ｔ１ＣＨ／Ｔ１ＣＨ２的值由最稀浓度下的１．７过渡到１。说明在交联网络中，交联度很低时，链段的运动已经相当受约束；但交联度很大时，充分溶胀的交联网络中链段运动仍有一定自由度。而在线型高分子浓溶液中，链段的运动严重受阻，导致自旋扩散效应非常完全，彻底平均掉了各质子间Ｔ１时间的差异。 The relaxation behavior of protons in swollen crosslinked polyacrylamide-acrylic networks and linear polystyrene solutions was investigated by spin-lattice relaxation time (T1). In the crosslinked network, the T1CH / T1CH2 gradually increases from 1.17 to 1 as the degree of crosslinking increases. In the linear polystyrene solution, the value of T1CH / T1CH2 is from 1 at the lean concentration. 7 transition to 1. It shows that in the crosslinked network, the motion of the segment is quite restrained when the degree of crosslinking is very low. However, when the degree of crosslinking is large, the chain segment in the fully swollen crosslinked network still has some degree of freedom. However, in the concentrated linear polymer solution, the movement of the segments was severely blocked, resulting in a very complete spin diffusion effect, completely averaging the differences in T1 time between the protons.