Molecular Rheology of Isotropic and Anisotropic Entangled Polymer Liquids

小行星9700928 这项资助涉及阿克伦大学（俄亥俄州阿克伦）聚合物工程系和俄罗斯科学院（俄罗斯莫斯科）石化合成研究所流变学实验室之间的合作研究。 分子流变学中的几个基本问题将在这项工作的过程中进行调查。 工作的主要目标如下：具有长链和柔性链的聚合物的自洽条件的分析和数值研究。 用环概念研究聚合物线性粘弹性行为的分子方法。 窄分布聚合物中慢弛豫过程的实验研究。 用平均场方法阐述液晶高分子中的弛豫相互作用理论，建立了液晶高分子的本构方程。 这一研究为聚合物的流动和加工奠定了理论和实验基础。 ***

9700928 Leonov This grant involves cooperative research between the Department of Polymer Engineering, The University of Akron (Akron, OH) and the Laboratory of Rheology, Institute of Petrochemical Synthesis, the Russian Academy of Sciences (Moscow, Russia). Several fundamental problems in molecular rheology will be investigated in the course of this work. The primary objectives of the work are the following: Analytical and numerical studies of a self-consistent condition for polymers with long and flexible chains. A molecular approach to linear viscoelastic behavior of polymers using looping concept. Experimental studies of slow relaxation processes in narrow distributed polymers. A theory of relaxation interaction in liquid crystalline polymers using a mean field approach to elaborate a constitutive equation for liquid crystalline polymers of nematic type. %%% This research helps to lay the theoretical and experimental foundations for the understanding of polymer flow and processing. ***