Molecular Study of Associating Polymer Rheology

对缔合聚合物体系的流变性进行了理论研究。(1)低相对分子质量表面活性剂的影响：研究表明，在混合胶束形成过程中，峰高出现在零剪切粘度中，松弛时间强烈依赖于混合胶束形成过程中的协同作用。(2)每个链上的缔合基团数目的影响：结果表明，如果束缚状态下每个链上的平均缔合基团数目较大，则粘弹性松弛行为可以用Rouse模型很好地描述。(3)结结构的影响：由于缔合/解离过程的协同效应，最长弛豫区随结区长度的不同而偏离Maxwell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.