Dynamics of Surface-Bound Polymers

[500926]布卢姆这项研究旨在研究聚合物在固体表面上的分子运动。这项工作很重要，因为多相材料，特别是复合材料的性能不仅取决于主要组分的性能，而且取决于界面和界面材料的性能。由于界面层通常很薄，因此需要光谱等微观技术来表征它们。本研究的重点是界面聚合物的微观动力学。这是对已经进行的更丰富的结构研究的补充。总之，界面材料的结构和动力学知识将有助于研究人员设计具有最佳性能的界面系统，用于高级复合材料或颗粒稳定等先进应用。具体来说，固态氘核磁共振和其他技术将用于探测特定氘化聚合物的分子运动。使用氘标记是很重要的，因为它不会对界面造成明显的扰动，并且氘根据其位置作为报告基团，这是综合控制的。特别感兴趣的是二氧化硅或氧化铝表面结合的均聚物和嵌段共聚物的动力学。* * *

9500926 Blum This research aims to study the molecular motion of polymers on solid surfaces. This work is important because the properties of multiphase materials, especially composites depend not only on the properties of the major components, but also on the properties of the interface and interfacial materials. Since the interfacial layers are normally quite thin, microscopic tehcniques such as spectroscopy are needed for their characterization. The focus of the present work is on the microscopic dynamics of interfacial polymers. This complements the more abundant structural studies which have been done. Together, knowledge of the structure and dynamics of interfacial materials will help researchers to design interfacial systems with optimum properties for advanced applications such as advanced composites or particle stabilization. %%% Specifically, solid-state deuterium NMR and other techniques will be used to probe molecular motion of specifically deuterated polymers. The use of deuterium labelling is important because it is no a significant perturbation of the interface and the deuterons act as reporter groups based on their position which is synthetically controlled. Of specific interest is the dynamics of surface-bound homopolymers and block copolymers on silica or alumina. ***