Molecular Study of Associating Polymer Rheology

对缔合聚合物体系的流变学进行了理论研究。(1)低分子量表面活性剂的影响：零剪切黏度出现峰高，弛豫时间强烈依赖于混合胶束形成中的协同作用。(2)单链缔合基团数的影响：研究表明，当单链在束缚状态下的平均缔合基团数较大时，用Rouse模型可以很好地描述粘弹性松弛行为。(3)结结构的影响：由于缔合/解离过程的协同效应，随着结区长度的增加，最长的弛豫状态会偏离麦克斯韦行为。

Rheology of associating polymer systems was theoretically studied. (1) The influence of low-molecular-weight surfactants : It was shown that the peak height appeared in the zero-shear viscosity and the relaxation time strongly depends on the synergism in the mixed micelle formation. (2) Effect of the number of associative groups per chain : It was shown that if the average number of associative groups per chain in bound state is large, viscoelastic relaxation behavior is well described in terms of the Rouse model. (3) Effect of the junction structure : Due to the cooperativity effect of the association/dissociation processes, the longest relaxation regime was shown to deviate from the Maxwell behavior depending on the length of the junction zone.