Rheology and Structure of Ionomer and Associating Polymer Solutions

离聚物和缔合聚合物溶液的流变学和结构

• 批准号: 9815942
• 负责人: Eric Kaler
• 金额: $ 26.1万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9815942&HistoricalAwards=false
• 关键词: Rheology; Structure; Ionomer; Associating; Polymer

9815942 Cooper The solution properties of ionomers as well as associating polymers will be investigated. Viscometric, static and dynamic light scattering, SAXS, SANS, and rheological experiments on multi-functional telechelic and polyurethane ionomers will be used to determine the structure and thermodynamics of ionomer solutions in different polarity solvents and mixed solvents over a broad concentration regime. The study can be expected to provide insight into the controversial origin of polyelectrolyte behavior. The internal structure and dynamics of the ionic aggregates will be modeled using Monte Carlo and molecular dynamics simulations. The effect of deformation on the structure and chain stretching of hydrophobically terminated associating polymers will be determined through rheological, flow birefringence, and SANS studies. Particular attention will be paid to determine the molecular factors governing shear thickening phenomena. The experimental findings will be tested against the theoretical predictions of a molecular model for telechelic associating systems such as random copolymer ionomer solutions. %%% The proposed research plus other projects related to studies of ionomer morphology and block copolymers represent a broad and integrated program designed to bring fundamental understanding of complex fluid rheology. The results of the proposed studies will lead to a more complete understanding of ionomer solution behavior, leading to better utilization in commercial applications. The experimental data will instigate the development of new theories as well as provide a means of testing them. The overall research findings resulting from this investigation should be useful in defining more predictable processing conditions for these important classes of polymers. These materials find applications as membranes, adhesives, coatings, viscosity modifiers, and packaging materials; all of which are sensitive to the material processing history.

9815942 Cooper将研究离子体和关联聚合物的溶液特性。 粘度，静态和动态光散射，SAX，SAS和流变学实验将用于多功能远程技术和聚氨酯离子体对不同极性溶剂中不同极性溶剂中离子溶液的结构和热力学来确定广泛浓度方向上的离子溶液的结构和热力学。 可以预期该研究可以洞悉多电解质行为的有争议的起源。 离子聚集体的内部结构和动力学将使用蒙特卡洛和分子动力学模拟进行建模。 变形对疏水终止关联聚合物的结构和链伸展的影响将通过流变学，流行双向发展和SANS研究确定。 将特别注意确定控制剪切增厚现象的分子因子。 实验发现将根据分子模型的理论预测进行测试，用于远程技术关联系统，例如随机共聚物离子溶液。 %% %%拟议的研究以及与离子形态和块共聚物研究有关的其他项目代表了一个广泛而综合的计划，旨在带来对复杂流体流变学的基本了解。 拟议研究的结果将导致对电离溶液的行为有更全面的了解，从而在商业应用中更好地利用。 实验数据将促进新理论的发展，并提供一种测试它们的方法。 这项研究产生的总体研究结果对于确定这些重要类别类别的聚合物的更可预测的处理条件应该很有用。 这些材料发现应用于膜，粘合剂，涂料，粘度修饰符和包装材料。所有这些都对材料处理历史敏感。