Effect of Salt on the Dynamics of Polymers Measured by Nuclear Magnetic Resonance

核磁共振测量盐对聚合物动力学的影响

• 批准号: 9012256
• 负责人: John Shibata
• 金额: $ 12.91万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1995-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9012256&HistoricalAwards=false
• 关键词: Effect; Salt; Dynamics; Polymers; Measured

The objective of this research is to describe the effect of ions on the segmental and local motions of polymers in the presence and absence of low-molecular-weight solvent molecules. The polymers and salts of interest are those that exhibit high ionic conduction such as poly(ethylene oxide) and lithium perchlorate. Multifield, multinuclear, and variable temperature nuclear spin lattice relaxation experiments will be performed on different polymer/salt systems. The resulting T1 data will be analyzed using dynamic models for the segmental and local motions of the polymer. The relationship between polymer motion and ionic conduction will be investigated by this technique. Segmental motion of the polymer contributes to high ionic conduction in polymer/salt systems according to dynamic bond percolation theory;. The interaction between certain polymers and salts is an example of the importance of site-specific interactions in determining the properties of polymer-based materials. This study investigates site-specific interactions by a dynamic rather than static approach to reveal the impact of these interactions. Ultimately, the results of this research will provide the basis for a comprehensive analysis of the present state of theory and encourage further theoretical development.

本研究的目的是描述 离子对聚合物链段和局部运动的影响 并且不存在低分子量溶剂分子。 的 感兴趣的聚合物和盐是那些表现出高离子强度的聚合物和盐。 导电材料如聚（环氧乙烷）和高氯酸锂。 多场、多核和变温核自旋 晶格弛豫实验将在不同的 聚合物/盐体系。 将使用以下方法分析所得T1数据 聚合物的链段和局部运动的动态模型。 聚合物运动和离子导电之间的关系将 通过这项技术进行研究。 聚合物的链段运动有助于高离子聚合。 聚合物/盐体系的动态键导电 渗流理论; 某些聚合物和 盐是位点特异性相互作用重要性的一个例子 在确定聚合物基材料的性能。 这 一项研究通过一种动态的、 而不是静态的方法来揭示这些相互作用的影响。 最终，这项研究的结果将为 全面分析了目前的理论状况， 进一步推动理论发展。