Materials Research Group - Structure, Dynamics & Transitionsof Liquid Crystal Polymers

材料研究组 - 结构、动力学

• 批准号: 9122227
• 负责人: John Blackwell
• 金额: $ 248.3万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9122227&HistoricalAwards=false
• 关键词: Materials; Research; Group; Structure; Dynamics

This award is for the renewal of the Materials Research Group at Case Western Reserve University (Grant of structure, dynamics, and transitions of liquid crystalline polymers. The primary goal of the research by the group is to understand the physical and chemical requirements for generation of crystalline structures containing fully extended chains from neumatic columnar hexagonal phases and copolymers containing these phases. The research emphasis is on synthesis of polymers, having controlled molecular structure, which are predicted to have neumatic of columnar phases, with focus on main chain polyesters and polyethers in which asymmetric mesogens are linked by flexible spacers. The work also includes synthesis of supramolecular self- assembling polymers designed to have cylindrical conformations, preparation and characterization of micro-phase-separated supramolecular assemblies, based on block co-polymers that contain different mesomorphic and glassy segments. The structure and dynamics of these polymers is being determined by x-ray and neutron scattering, static and dynamic light scattering, fluorescence energy transfer spectroscopy, and nuclear magnetic resonance spectroscopy. The electronic, magnetic, optical, and dielectric properties are also being determined. Theoretical analyses of the molecular assembly, dynamics, phase transitions, rheology and other physical properties of the mesophases is also being done in parallel with the experimental effort.

该奖项旨在表彰凯斯西储大学材料研究小组的更新（授予液晶聚合物的结构、动力学和转变）。该小组研究的主要目标是了解从向列柱状六方相和包含这些相的共聚物生成包含完全延伸链的晶体结构的物理和化学要求。研究重点是具有受控分子结构的聚合物的合成， 预计它们具有向列相柱状相，重点是主链聚酯和聚醚，其中不对称介晶通过柔性间隔基连接。 这项工作还包括设计具有圆柱形构象的超分子自组装聚合物的合成、基于含有不同成分的嵌段共聚物的微相分离超分子组装体的制备和表征。 介晶段和玻璃段。 这些聚合物的结构和动力学通过 X 射线和中子散射、静态和动态光散射、荧光能量转移光谱和核磁共振光谱来确定。 电子、磁、光和介电特性也正在确定中。 分子组装、动力学、相变、流变学和其他物理性质的理论分析 中间相也在与实验工作同时进行。