Rheology of Concentrated Colloidal Dispersions: Effects of Triblock and Comb-Graft Associative Polymers

本课题的目的是通过研究颗粒间力、微观结构和流变性能之间的关系，为制备具有定制流变性质的浓缩分散体提供理论基础和实验支持。例子包括含有端块和链结合聚合物的球体的稳定分散体。实验将流变学测量与动态光散射和流变光学技术相结合。这些数据将用非平衡统计力学来解释，包括对聚合物文献中胶束和刷子的处理。守恒方程描述了布朗球色散的微观结构，这些色散通过配对加性势、短程流体动力相互作用以及受剪切或其他外场的影响而相互作用。所提出的研究与材料和化学工业有关，其中成分，微观结构和流变行为之间的联系是重要的。＊＊＊

Abstract CTS-9812409 W.B. Russel, Princeton University The objective of this proposal is to develop a theoretical basis supported by experiments for the formulation of concentrated dispersions with tailored rheology by investigating the relationship among interparticle forces, microstructure and rheological properties. Examples will include stable dispersions of spheres containing end block and chain associative polymers. Experiments combine rheological measurements with dynamic light scattering and rheo-optical techniques. The data will be interpreted using non-equilibrium statistical mechanics and including the treatment of micelles and brushes form the polymer literature. A conservation equation describes the microstructure of a dispersion of Brownian spheres interacting through pairwise additive potentials, short range hydrodynamical interactions, and subjected to shear or other external fields. The proposed research has relevance to materials and chemicals industries where the connection between composition, microstructure and rheological behavior are important. ***