International Postdoctoral Fellows Program: Rheology and Morphology of Immiscible Blends of Flexible and Liquid Crystal Polymers

国际博士后项目：柔性液晶聚合物不混溶混合物的流变学和形态学

• 批准号: 9505545
• 负责人: Lynn Walker
• 金额: $ 2.93万
• 依托单位: Individual Award
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9505545&HistoricalAwards=false
• 关键词: International; Postdoctoral; Fellows; Program; Rheology

9505545 Walker The International Junior Investigator and Postdoctoral Fellows Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support an eight-month postdoctoral research visit by Dr. Lynn M. Walker to work with Professor Paula Moldenaers at Katholieke Universiteit Leuven in Belgium. The blending of polymeric materials during processing is a rapidly growing industrial practice with the goals of capitalizing on specific pure component properties and lowering processing costs. Blending offers an almost infinite range of final properties, the potential to utilize recycled and high volume materials and the ability to use existing processing equipment without costly alterations. Unfortunately, the blending of polymeric materials is not fully understood at a fundamental level, making the robust a priori prediction of final properties almost impossible. This limits the widespread use of heterogeneous blends, especially those containing complex and specialized polymeric materials. However it is the unique properties of these complex polymeric materials that offer the most potential gain in blending processes. The purpose of this research is to gain a fundamental grasp of the flow-induced behavior observed in one special group of blends. Specifically, the PI will study heterogeneous blends containing a matrix of flexible polymer and inclusions of liquid crystal polymer (LCP), and perform several rheological and rheo-optical experiments on a model blend. The results will provide quantitative estimates of the macroscopic and microscopic parameters used in present models for heterogeneous blends. ***

9505545沃克国际初级调查员和博士后研究员计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该计划的奖项为联合研究提供了机会，以及在国外使用独特或补充设施，专业知识和实验条件。 该奖项将支持Lynn M. Walker博士在比利时的Katholieke Universiteit Leuven与Paula Moldenaers教授一起进行八个月的博士后研究访问。 在加工过程中，聚合材料的混合是一种快速增长的工业实践，其目标是利用特定的纯零件特性并降低加工成本。 混合提供了几乎无限的最终属性，具有利用可回收和大量材料的潜力以及使用现有的加工设备而无需昂贵的更改的能力。 不幸的是，在基本层面上没有完全了解聚合物材料的混合，这使得强大的最终性质的先验预测几乎是不可能的。 这限制了异质混合物的广泛使用，尤其是那些含有复杂和专业的聚合物材料的混合物。 但是，这些复杂的聚合物材料的独特特性在混合过程中提供了最大潜在的增益。 这项研究的目的是对在一个特殊的混合组中观察到的流动诱导的行为进行基本掌握。具体而言，PI将研究包含柔性聚合物和液晶聚合物（LCP）夹杂物的异质混合物，并在模型混合物上执行几种流变学和流感光学实验。结果将提供对当前模型中用于异质混合物的宏观和微观参数的定量估计。 ***