Associative Phenomena in Ionomer Solutions

9531069库珀这个项目建议研究含离子聚合物的溶液。将解决以下问题：1)离聚体溶液的静态性质。模型遥螺旋离聚体的粘度学、光散射、SAXS和SANS实验将被用来研究链间缔合作用，并在较宽的浓度范围内确定低极性缔合离聚体溶液的结构和热力学。2)离聚体溶液的动力学性质。变形对模型遥链和聚氨酯离聚体结构和链伸长的影响将被确定。在缔合离聚体溶液中，将特别注意确定控制剪切增稠和剪切变稀现象的分子因素。%本次调查得出的总体研究结果应有助于为这一重要类别的聚合物确定更可预测的加工条件。这些材料可用作薄膜、粘合剂、涂料、粘度改进剂和包装材料；所有这些都对材料加工历史敏感。***

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. ***