Transport in Polyelectrolyte Solutions

这项工作的目的是研究聚合物溶液中的扩散和输运。主要的物理方法是光散射光谱，这是一种非侵入性的探测布朗运动和在平衡复杂流体中扩散的探测器。将测量聚合物链在含有第二类聚合物链的溶液中的扩散，并与现有的聚合物动力学模型进行比较。将观察介观(200A微米)探针粒子在聚合物溶液中的扩散。特别令人感兴趣的是探针粒子在非常大的浓度和分子量下在聚合物溶液中的行为，探针扩散系数的温度依赖性，以及探针粒子在聚合物溶液中的行为，其中聚合物具有异常广泛的分子量分布。将努力让本科生参与真正的、可发表的研究，从而潜在地增强该国的科学和工程人才库。与这些实验相关的理论模型将得到改进。

The objective of this work is to study diffusion and transport in polymer solutions. The primary physical method will be light scattering spectroscopy, which is a non-invasive probe of Brownian motion and diffusion in equilibrium complex fluids. Measurements of the diffusion of polymer chains through solutions containing a second type of polymer chain will be made and compared with extant models of polymer dynamics. Observations will be made on the diffusion of mesoscopic (200A-micrometer) probe particles through polymer solutions. Of particular interest are the behavior of probe particles in polymer solutions at very large concentrations and molecular weight, the temperature dependence of the probe diffusion coefficient, and the behavior of probe particles in polymer solutions in which the polymer has an unusually wide molecular weight distribution. A effort will be made to involve undergraduate students in real, publishable research, thereby potentially enhancing the country's scientific and engineering manpower pool. Theoretical models relevant to these experiments will be improved.