Study of Structure and Dynamic Interactions in Dispersions of Particles in Liquid Crystalline Polymers

摘要 提案编号： 9618777提案类型： 研究者发起的主要研究者 大卫·A Hill Affiliation 圣母大学 该补助金通过化学和运输系统司界面，运输和分离计划的分离和纯化计划子要素授予。 主要研究者是Davide A。圣母大学的希尔游戏。 提出的研究的目的是寻求通过插入具有定制形状和表面形态的填料颗粒来改善液晶聚合物（LCP）的机械性能的方法。 尽管液晶聚合物具有优异的热、化学和介电性能，但其在三维结构生产中的应用有限。 这些材料的一个严重缺点是易于沿强分子排列的表面沿着断裂。 液晶聚合物在纺丝方向上具有高的拉伸强度，但横向内聚力极弱。 填充材料的引入用于锚链并使液晶聚合物基质中的期望取向图案成核。 将选择颗粒特性来设计具有受控微观结构的材料。 这项研究的重要性在于它有可能通过改善这些有用材料的机械性能来影响液晶聚合物的加工。 机械性能的这种改进可以开辟新的应用领域，包括用作分离介质。 从基本观点来看，该研究将促进对液晶聚合物中的动态相互作用和结构发展的理解。

ABSTRACT Proposal No: 9618777 Proposal Type: Investigator Initiated Principal Investigator Davide A. Hill Affiliation University of Notre Dome This grant is awarded through the Separations and Purification Program sub-element of the Interfacial, Transport and Separations Program of the Chemical and Transport Systems Division. The principal investigator is Davide A. Hill of the University of Notre Game. The objective of the proposed research is to seek methods for improving the mechanical properties of liquid crystal polymer(LCPs) by inserting filler particles with tailored shape and surface morphology. Despite their outstanding thermal, chemical and dielectric properties, liquid crystal polymers have found limited application for production of three-dimensional structures. A severe drawback of these materials is the ease of fracture along surfaces of strong molecular alignment. Liquid crystal polymers have high tensile strength in the spinning direction but extremely weak lateral cohesion. The introduction of filler material serves to anchor the chains and nucleate desirable orientation patterns in a liquid crystal polymer matrix. Particle characteristics will be selected to engineer materials with controlled microstructures. The importance of the research is its potential to influence the processing of liquid crystal polymers by improving the mechanical properties of these useful materials. Such improvement in mechanical properties may open up new areas of applications, including use as separations media. From a fundamental viewpoint, the research will advance the understanding of dynamic interactions and structure development in liquid crystal polymers.