An Experimental Exploration of Structure-Property Relationships Which Delimit Transport in and Physical Aging of Glassy Membrane and Barrier Materials

限制玻璃膜和阻挡材料的传输和物理老化的结构-性能关系的实验探索

• 批准号: 9101587
• 负责人: Benny Freeman
• 金额: $ 7.99万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1995-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101587&HistoricalAwards=false
• 关键词: Experimental; Exploration; Structure; Property; Relationships

The proposed experimental research program is designed to address those fundamental, structural, mesogenic, and configurational features of liquid crystalline polymers and closely related polymer structures which confer high barrier properties upon liquid crystalline polymers as a class of materials. The research will focus upon explicit comparison of the properties of isotropic, amorphous, and disordered polymers and the identical polymers which have developed liquid crystalline order by solvent or thermal treatment. Moreover, the effect of systematic structure and configurational changes on sorption and transport behavior of liquid crystalline polymers will further define the role of liquid crystalline order on the barrier properties of liquid crystalline polymeric materials. These fundamental studies are directed toward developing an expanded and more subtle repertoire of structural modifications which would be useful for the rational tailoring of super-barriers based upon liquid crystalline polymers and will also provide useful mechanistic insight into the fundamental basis for high permeability in disordered rigid-rod polymeric materials. Central to the thesis under consideration is the notion that extremely subtle structural, mesogenic, and configurational features distinguish the most permeable from the least permeable polymeric materials. This project is jointly supported by NSF and the Electric Power Research Institute (EPRI), following a special NSF-EPRI research initiative on polymeric materials.

拟议的实验研究计划旨在 解决那些基本的，结构的，介晶的， 液晶聚合物的构型特征， 具有高阻隔性的密切相关的聚合物结构 液晶聚合物作为一类 材料. 研究将集中在明确的比较 各向同性、无定形和无序的性质 聚合物和已经开发的相同聚合物 液晶顺序通过溶剂或热处理。 此外，系统结构和 吸附和传输行为的构型变化 液晶聚合物将进一步定义 液晶有序性对液体阻隔性能的影响 结晶聚合物材料。 这些基础研究 都是为了发展一种更广泛更微妙的 有用的结构修饰库 基于液体的超级屏障的合理定制 结晶聚合物，并且还将提供有用的机械性能。 深入了解高渗透性的根本基础， 无序刚性杆聚合物材料。 的核心 我们正在考虑的论点是， 结构、介晶和构型特征 区分最具渗透性和最不具渗透性 聚合物材料。 该项目由美国国家科学基金会和美国电气 电力研究所（EPRI），继一个特殊的NSF-EPRI 聚合物材料的研究倡议。