U.S.-Czechoslovakia Polymer Research on Polyelectrolyte Structure and Dynamics

这项由南加州大学的Eric J. Amis博士和斯洛伐克科学院实验物理研究所的Marian Sedlak博士合作的美国-捷克斯洛伐克研究项目将研究在不添加盐的情况下溶液中聚电解质的性质。未筛选的静电相互作用以复杂和特定的方式影响聚电解质的行为。在这项工作中，研究人员结合了两种成熟的方法来研究聚合物动力学：动态光散射和动态粘弹性。结合重叠的时间窗口和独特的灵敏度，应该减少单独解释任何一个实验的困难。研究人员还将研究聚电解质中多链结构域的形成机理，重点研究聚电解质的结构和动力学对浓度、分子量、电荷密度、静电筛选、链构象、溶剂介电常数。这个聚合物研究项目通过使东欧和美国的领先专家在共同感兴趣和有能力的领域结合互补的人才和汇集资源，实现了推进科学知识的计划目标。

This U.S.-Czechoslovakia research project between Dr. Eric J. Amis of the University of Southern California and Dr. Marian Sedlak of the Institute of Experimental Physics, Slovak Academy of Sciences, Kosice will examine the properties of polyelectrolytes in solution without added salt. Unscreened electrostatic interactions influence polyelectrolyte behavior in complex and specific ways. In this work, the researchers combine two proven methods for investigating polymer dynamics: dynamic light scattering and dynamic viscoelasticity. The combination, with overlapping time windows and unique sensitivities, should reduce the difficulties of interpreting either experiment alone. The researchers will also study the mechanism of formation of multichain domains in polyelectrolytes, with emphasis on the dependence of polyelectrolyte structure and dynamics on concentration, molecular weight, charge density, electrostatic screening, chain conformation, and solvent dielectric permitivities. This project in polymer research fulfills the program objective of advancing scientific knowledge by enabling leading experts in Eastern Europe and the United States to combine complementary talents and pool resources in areas of strong mutual interest and competence.