Structure and Dynamics of Polymer Mixtures

聚合物混合物的结构和动力学

• 批准号: 9528481
• 负责人: Timothy Lodge
• 金额: $ 33万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-01 至 1999-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9528481&HistoricalAwards=false
• 关键词: Structure; Dynamics; Polymer; Mixtures

9528481 Lodge Polymer mixtures - blends, copolymers, and combinations thereof - are an increasingly important source of superior macromolecular materials. Four specific project areas are identified. The first concerns the underlying timescale for segmental rearrangements, which impacts all dynamic properties through the monomeric friction factor. A second project will examine tracer diffusion in weakly-segregated copolymers and blends. The third thrust emphasizes more strongly-segregated structures, namely block copolymers in the ordered state, and the tracer diffusion of copolymers, homopolymers, and small molecule probes therein. The final area of interest is the role of solvent concentration and quality in determining the morphologies adopted by block copolymers. Particular emphasis will be placed on continuously-variable solvent selectivity, to be achieved in part via mixed solvent. %%% This research will lead to fundamental understanding of structures and interactions of polymer chains in mixtures of polymers and copolymers with extensions on processability and property optimization. ***

洛奇聚合物混合物-共混物、共聚物及其组合-是越来越重要的上级大分子材料的来源。 确定了四个具体项目领域。 第一个问题是链段重排的潜在时间尺度，它通过单体摩擦因子影响所有动态特性。 第二个项目将研究示踪剂在弱分离共聚物和共混物中的扩散。 第三个推力强调更强的隔离结构，即在有序状态下的嵌段共聚物，和共聚物，均聚物，和小分子探针在其中的示踪剂扩散。 感兴趣的最后一个领域是溶剂浓度和质量在确定嵌段共聚物所采用的形态中的作用。 特别强调的是连续可变的溶剂选择性，部分通过混合溶剂实现。 这项研究将导致对聚合物和共聚物混合物中聚合物链的结构和相互作用的基本理解，并扩展加工性和性能优化。 ***