Associative Phenomena in Ionomer Solutions

这个项目提议研究含离子聚合物的溶液。以下问题将被解决：1)离聚体溶液的静态性质。模型远旋离聚体的粘度、光散射、SAXS和SANS实验将用于研究链间缔合，并确定低极性缔合离聚体溶液在广泛浓度范围内的结构和热力学。2)离聚体溶液的动力学性质。确定变形对模型远旋和聚氨酯离聚物的结构和链拉伸的影响。将特别注意确定在缔合离聚体溶液中控制剪切增厚和剪切变薄现象的分子因素。从这项调查中得出的总体研究结果应该有助于为这类重要的聚合物确定更可预测的加工条件。这些材料应用于膜，粘合剂，涂料，粘度调节剂和包装材料；所有这些都对材料的加工历史敏感。＊＊＊

9531069 Cooper This project proposes to investigate the solution of ion containing polymers. The following issues will be addressed: 1) Static Properties of Ionomer Solutions. Viscometric, light scattering, SAXS, and SANS experiments on model telechelic ionomers will be used to study interchain association and to determine the structure and thermodynamics of low polarity associating ionomer solutions over a broad concentration regime. 2) Dynamic Properties of Ionomer Solutions. The effect of deformation on the structure and chain stretching of model telechelic and polyurethane ionomers will be determined. Particular attention will be paid to determining the molecular factors governing shear thickening and shear thinning phenomena in associating ionomer solutions. %%% The overall research findings resulting from this investigation should be useful in defining more predictable processing conditions for this important class of polymer. These materials find applications as membranes, adhesives, coatings, viscosity modifiers, and packaging mateials; all of which are sensitive to the material processing history. ***