Phase Behavior, Chain Packing, and Local Dynamics in Solid Polyolefin Blends

固体聚烯烃共混物中的相行为、链堆积和局部动力学

• 批准号: 0137968
• 负责人: Jeff White
• 金额: $ 27万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0137968&HistoricalAwards=false
• 关键词: Phase; Behavior; Chain; Packing; Local

This project aims to understand the role of polymer composition, chain architecture, and individual chain dynamics in determining local structure at length scales less than the radius of gyration in the solid state for polyolefin blends. Solid state nuclear magnetic resonance will be the chief tool used to interrogate the morphology and dynamics in selected blends. Magnetic resonance is ideally suited for selectively probing structure and dynamics in macromolecules, even for polymer blends prepared without any special isotopic labeling schemes. The result of this work will be a detailed understanding of structure/miscibility relationships for solid polyolefin blends at the chain level, which should lead to novel blend compositions based on designed chain architectures, and therefore, new and industrially useful materials. Graduate and undergraduate research students will apply the latest instrumentation and polymer synthesis techniques, and strong industrial relationships in this area will afford ample opportunity for working collaborations. In turn, they will share these experiences with middle school students in the North Carolina State University area as part of a project to develop programs for exposing these students to exciting aspects of polymer science.Polymers are a class of materials made from extremely large molecules that find applications in many important commercial areas ranging from food packaging to aerospace composites. Within this class of materials are the saturated hydrocarbon polymers, or polyolefins, which are among the most economically important industrial polymers. The research students trained in the "science" of designing new polymeric materials will be very competitive for employment opportunities in both the industrial and academic sectors.

该项目旨在了解聚合物组成，链结构和单个链动力学在确定局部结构尺度的局部结构中的作用小于聚烯烃混合物的固态中的回旋半径。 固态核磁共振将是用于询问选定混合物中形态和动力学的主要工具。 磁共振非常适合在大分子中选择性探测结构和动力学，即使对于无需任何特殊同位素标记方案而制备的聚合物混合物也是如此。这项工作的结果将是对固体聚烯烃在链级上混合的结构/混杂关系的详细理解，这应该导致基于设计的链体架构，从而导致新颖的混合组成，因此，新的和工业上有用的材料。研究生和本科研究的学生将采用最新的仪器和聚合物合成技术，并且该领域的牢固的工业关系将为工作合作提供足够的机会。 反过来，他们将与北卡罗来纳州立大学地区的中学生分享这些经验，这是一个项目的一部分，旨在开发计划，以使这些学生暴露于聚合物科学的令人兴奋的各个方面。聚合物是一类由极大的分子制成的一类材料，这些材料是在许多重要的商业领域中发现的，从食品包装包装到航空航天材料。在这类材料中，是饱和的碳氢化合物聚合物或聚烯烃，这些聚合物是最重要的工业聚合物之一。在设计新聚合物材料的“科学”培训的研究专业的研究生中，在工业领域和学术领域的就业机会都非常有竞争力。