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步行者 国际初级研究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。该计划的奖项提供了联合研究的机会，以及使用国外独特或互补的设施，专业知识和实验条件。 该奖项将支持博士为期八个月的博士后研究访问林恩M。步行者与比利时鲁汶天主教大学的保拉·莫尔德纳斯教授一起工作。 聚合物材料在加工过程中的共混是一种快速发展的工业实践，其目的是利用特定的纯组分性质并降低加工成本。 混合提供了几乎无限范围的最终性能，利用回收和大量材料的潜力，以及使用现有加工设备而无需昂贵改造的能力。 不幸的是，聚合物材料的共混在基本水平上没有得到充分的理解，使得对最终性质的可靠的先验预测几乎是不可能的。 这限制了非均相共混物的广泛使用，特别是那些含有复杂和专用聚合物材料的共混物。 然而，正是这些复杂聚合物材料的独特性能在共混过程中提供了最大的潜在收益。 本研究的目的是获得一个基本的把握在一个特殊的共混物组中观察到的流动诱导行为。具体而言，PI将研究包含柔性聚合物基质和液晶聚合物（LCP）夹杂物的非均相共混物，并对模型共混物进行几项流变学和流变光学实验。结果将提供定量估计的宏观和微观参数在本模型中使用的非均相共混物。 ***