Dynamics in Interfacial Polymer Systems

界面聚合物系统动力学

• 批准号: 0706197
• 负责人: Frank Blum
• 金额: $ 36.25万
• 依托单位: Missouri University of Science and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0706197&HistoricalAwards=false
• 关键词: Dynamics; Interfacial; Polymer; Systems

TECHNICAL SUMMARY:This research will focus on determining the rates, mechanisms, and causes of molecular motion in adsorbed polymer systems. An understanding of the properties of adsorbed polymers requires knowledge of both the structure and dynamics in interfacial systems. The behavior of the interfacial systems becomes more important as the size of the systems is reduced. The properties of polymer systems at interfaces will be determined using a variety of techniques, including, nuclear magnetic resonance spectroscopy (NMR), and also modulated differential scanning calorimetry (MDSC), Fourier-transform infra-red spectroscopy (FTIR), and other techniques. The chemical/spectroscopic results will be correlated, when possible, to physical property studies, such as the measurement of adhesion in thin films. Of specific interest to the work outlined in this proposal are the effects of plasticizer in polymer films, the dynamics associated with end groups in adsorbed polymers, the behavior of chains "grafted from" silica surfaces, the structure and dynamics of adsorbed copolymers, and the nature of polymer nanocomposites.NON-TECHNICAL SUMMARY:This research will result in improving the reliability and usefulness of critical electronic and other devices and systems that are important in today's high tech world. Successful development of stronger and lighter-weight composite materials can improve electronic devices, such as microchips, sensors, and computer memory. Because many of the properties of polymers (long chain molecules, like those in plastics) used in manufacturing these devices are not understood, the usefulness of these devices may be limited and critical failures possible. Accordingly, by determining properties and behaviors of materials used in these complex systems, device manufacturers will be able to produce better, more reliable devices. In addition, the students trained in this area will enhance our national competitiveness in the important technological area of material science.

技术概要：本研究将集中于确定吸附聚合物系统中分子运动的速率、机制和原因。了解吸附聚合物的性质需要了解界面系统的结构和动力学。随着系统尺寸的减小，界面系统的行为变得更加重要。聚合物系统在界面处的性质将使用多种技术来确定，包括核磁共振光谱（NMR），以及调制差示扫描量热法（MDSC）、傅里叶变换红外光谱（FTIR）和其他技术。如有可能，化学/光谱结果将与物理性质研究相关联，例如薄膜粘附力的测量。特别感兴趣的工作概述在这个建议是增塑剂在聚合物薄膜中的影响，与端基在吸附聚合物的动态，链的行为“接枝”二氧化硅表面，吸附共聚物的结构和动态，和聚合物nanocomposites.NON-TECHNICAL概要的性质：这项研究将导致提高可靠性和实用性的关键电子和其他设备和系统，是重要的在今天的高科技世界。 成功开发更坚固、更轻质的复合材料可以改善电子设备，如微芯片、传感器和计算机存储器。 由于用于制造这些器械的聚合物（长链分子，如塑料中的长链分子）的许多特性尚不清楚，因此这些器械的有用性可能受到限制，并且可能出现严重故障。 因此，通过确定这些复杂系统中使用的材料的特性和行为，设备制造商将能够生产更好，更可靠的设备。此外，在这一领域培养的学生将提高我们在材料科学这一重要技术领域的国家竞争力。