Polymer Dynamics on Monolayers and in Complex Media

单层和复杂介质中的聚合物动力学

• 批准号: 9203289
• 负责人: Hyuk Yu
• 金额: $ 58.5万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-01 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9203289&HistoricalAwards=false
• 关键词: Polymer; Dynamics; Monolayers; Complex; Media

Interfacial phenomena have become a frontier in polymer science, and much excitement is being generated in a wide variety of the areas dealing with molecular organization and self-assembly of surface-active polymers, forces between surfaces with adsorbed polymer chains, interface-mediated chain conformations and polymer- segment density profiles at interfaces. This is a project directed at the polymer-chain transport on monolayers at the interfaces of air/water and oil/water and toward such interfaces. With the interfacial dynamic techniques of 1) surface-fluorescence recovery after photobleaching, 2) surface quasielastic light scattering, and 3) electrocapillary-wave diffraction in conjunction with the interfacial static techniques of neutron reflectivity and spectroscopic ellipsometry, the investigators will examine (1) polymer lateral diffusion on the interface of air/water (A/W) and oil/water (O/W); (2) polymer monolayer viscoelasticity at A/W and at air/polymer interface; (3) polymeric interfaces and effect of copolymers as the surfactants; and (4) extend chain diffusion studies to electrophoresis of polyelectrolytes with the technique of electric-field-modulated Forced Rayleigh Scattering.

界面现象已经成为聚合物科学的前沿， 许多令人兴奋的事情正在发生， 涉及分子组织和自组装的领域 表面活性聚合物，吸附的表面之间的力 聚合物链、界面介导的链构象和聚合物- 界面处的片段密度分布。 这是一个针对聚合物链传输的项目， 在空气/水和油/水的界面处的单分子层以及朝向 这样的接口。 界面动力学技术：1） 光漂白后的表面荧光恢复，2）表面 准弹性光散射; 3）电毛细波 衍射结合界面静态技术 中子反射率和光谱椭圆偏振法， 研究人员将研究（1）聚合物在表面上的横向扩散 气/水（A/W）和油/水（O/W）界面;（2）聚合物 A/W和空气/聚合物界面的单层粘弹性;（3） 聚合物界面和共聚物作为表面活性剂的作用; （4）将链扩散研究扩展到电泳， 聚电解质电场调制技术 强迫瑞利散射