Diffraction Studies of the Structure and Structural Evolution in Conducting Polymers

小行星9305289 本计画是对各种典型导电高分子之链内及链间分子结构之基础性研究。 这项工作的主要目标是开发定量精确的模型来描述分子组织，以确定在合成或加工过程中出现的这种结构的细微变化，并将这种微观结构变化与电或传质性质的变化相关联。 另一个目标将是阐明关键的尺寸缩放关系和其他新的性能，导致在这些高度各向异性的宾主复合材料的分子水平上的各种竞争相互作用的微妙的相互作用。 X射线和中子散射都将与高度精细的建模算法相结合，这些算法已经过修改，以适应聚合物材料固有的特殊结构特性。 该项目是对导电聚合物的基本亚微观结构的深入研究--导电聚合物是一类新型的、技术上重要的聚合物。 目标是开发用于描述分子组织的定量精确模型，以识别在合成或加工过程中出现的这种结构的细微变化，并最终将这些微观结构变化与其他物理性质（例如，导电性、机械强度或质量扩散）。 除了解决与导电聚合物及其应用直接相关的问题外，本研究中开发的实验探针和数据分析技术将使更传统的聚合物主体材料的结构的类似研究成为可能。 ***

9305289 Winokur This project is a fundamental study of the intrachain and interchain molecular organization existing in various prototypical conducting polymers. The primary goals in this undertaking are to develop quantitatively accurate models for describing the molecular organization, to identify subtle changes in this structure which arise during synthesis or processing and to correlate this microstructural variation with changes in the electrical or mass transport properties. An additional goal will be to elucidate key size-scaling relationships and other novel properties that result from the subtle interplay of various competing interactions at the molecular level within these highly anisotropic guest-host composites. Both x-ray and neutron scattering will be employed in combination with highly refined modeling algorithms which have been modified to accommodate the special structure characteristics intrinsic to polymeric materials. %%% This project is an intensive investigation of the fundamental submicroscopic structure of conducting polymers--a novel and technological important class of polymers. Objectives are to develop quantitatively accurate models for describing the molecular organization, to identify subtle changes in this structure which arise during synthesis or processing, and finally to correlate these microstructural variations with changes in other physical properties (e.g., electrical conductivity, mechanical strength, or mass diffusion). In addition to resolving issues directly related to conducting polymers and their applications, the experimental probes and data analysis techniques developed in this research will enable analogous studies of structure in more conventional polymer host materials. ***