An Experimental Study of Structure-Property Relationships Governing Sorption, Transport, and Permeation of Small Molecules in Rodlike and Semi-Rodlike Aromatic Polyamides

小行星9402055 该实验研究计划旨在探索一类新型高度可溶的全芳族聚酰胺的合成和气体吸附，运输和渗透性能，该聚酰胺具有网状棒，可能是介晶，主链或半棒状主链和结构元素，这些结构元素可以是进一步反应的前体，例如交联或悬挂刚性或柔性基团的连接。 这些基础研究是针对开发一个扩展的和更微妙的结构修饰的合理剪裁的超膜和超级屏障有用的剧目。 中心的论文正在考虑的概念，提出的主要化学结构的变化可能会显着影响聚合物超结构（即聚合物链堆积），聚合物渗透剂的相互作用，并反过来，强烈影响气体的吸附，运输和渗透性能。 提出了一个实验方案，涉及控制合成的高度可溶性的全芳族聚酰胺具有取代基，可用于交联的聚合物或连接刚性或柔性侧链。 这些聚合物的化学结构、物理性质和气体传输性质将被表征以明确地确定侧链和主链分子结构和侧链刚度以及交联的可能性对整体吸附、传输和渗透行为的影响。 该研究计划将受益于与Hoechst Celanese公司研究人员的合作互动，该公司是高性能，高阻隔液晶聚合物生产的世界领导者。 这种合作将涉及每年几次访问的主要研究人员和学生与拟议的计划，以赫斯特，elanese设施。 此外，Hoechst Celanese人员每年都会访问北卡罗来纳州几次，以协调我们的研究计划与他们的目标。 此外，计算机建模和合成将由西班牙马德里科学研究上级委员会政治学和技术研究所的西班牙研究人员提供。 该小组在Javier de Abajo博士的指导下，在过去几年中与PI进行了非常密切的合作。 该合作研究计划已经产生了大约10篇与本提案中描述的聚合物类似的聚合物的合成和气体传输特性相关的研究出版物。 这次交流活动促进了双方的私人侦探和学生的多次访问。 合作将在拟议的研究计划中扩大，以利用我们西班牙合作伙伴广泛的计算机建模能力和专业知识，以及他们在新型聚合物合成领域的丰富经验。 ***

9402055 Freeman This experimental research program is designed to explore the synthesis and gas sorption, transport, and permeation properties of a new class of highly soluble wholly aromatic polyamides, having either ridded rod, possibly mesogenic, backbones or semi-rodlike backbones and structural elements which could be precursors for further reactions such as crosslinking or the attachment of pendent rigid or flexible groups. These fundamental studies are directed toward developing an expanded and more subtle repertoire of structural modifications useful for the rational tailoring of super-membranes and super-barriers. Central to the thesis under consideration is the notion that the proposed primary chemical structure variations could markedly influence polymer suprastructure (i.e. polymer chain packing), polymer-penetrant interactions, and, in turn, strongly affect gas sorption, transport, and permeation properties. An experimental program is proposed involving controlled synthesis of highly soluble wholly aromatic polyamides having substituents which could be used to crosslink the polymers or attach rigid or flexible side chains. The chemical structure, physicals properties, and gas transport properties of these polymers would be characterized to determine explicitly the influence of side and main chain molecular architecture and side chain stiffness, plus the potential for crosslinking, on the overall sorption, transport, and permeation behavior. This research program would benefit from collaborative interactions with researchers at the Hoechst Celanese Corporation, a world leader in the production of high performance, high barrier liquid crystalline polymers. This collaboration would involve several visits per year by principal investigators and students associated with the proposed program to Hoechst ,elanese facilities. Moreover, Hoechst Celanese personnel would visit NC State several times per year to coordinate the objectives of our research program with theirs. In addition, computer modeling and synthesis will be provided by Spanish researchers at the Instituto de Ciencia Y Tecnologia de Polimeros of the Consejo Superior de Investigaciones Cientificas (CSIC) in Madrid, Spain. This group, under the direction of Dr. Javier de Abajo, has worked very closely with the PIs during the past several year. This collaborative research program has already resulted in approximately 10 research publications related to the synthesis and gas transport characterization of polymers similar to the polymers described in this proposal. The exchange has stimulated several visits by PIs from both sides and students. The collaboration would be expanded in the proposed research program to take advantage of the extensive computer modeling capabilities and expertise of our Spanish partners as well as their extensive experience in the area of novel polymer synthesis. ***