Microscopic Origin of the Non-Newtonian Viscosity of Semiflexible Polymer Solutions in the Semidilute Regime.
Microscopic Origin of the Non-Newtonian Viscosity of Semiflexible Polymer Solutions in the Semidilute Regime.
复制标题
半稀释状态下半柔性聚合物溶液非牛顿粘度的微观起源
DOI：
10.1021/mz400607x
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发表时间：
2014
影响因子：
7.015
通讯作者：
A.R. Bausch
中科院分区：
文献类型：
--
作者：
B. Huber;M.B. Harasim;B. Wunderlich;M. Kröger;A.R. Bausch
高分子物理学的一个重要目标是将高分子流体的各种宏观特征与单链的微观行为联系起来。在这里，我们直接可视化的构象动力学的个别半柔性聚合物在一个semidilute以上的重叠浓度的剪切下的解决方案。我们观察到，翻滚动力学显着放缓，在显着对比的情况下，一个稀溶液，由于空间相互作用与相邻的细丝。所观察到的宏观剪切稀化效应可以合理化的一个简单的模型的基础上单丝动力学。
One of the great goals in polymer physics is to relate the various macroscopic features of polymeric fluids with the microscopic behavior of single chains. Here, we directly visualize the conformational dynamics of individual semiflexible polymers in a semidilute solution above the overlap concentration under shear. We observe that the tumbling dynamics are significantly slowed down, in marked contrast to the case of a dilute solution, due to steric interactions with neighboring filaments. The observed macroscopic shear thinning effect can be rationalized by a simple model based on the single filament dynamics.
影响因子：
8.6
作者：
Harasim, Markus;Wunderlich, Bernhard;Bausch, Andreas R.
通讯作者：
Bausch, Andreas R.