U.S.-France Cooperative Research: Relationship Between Molecular Suprastructure and Barrier Properties of MainchainLiquid Crystalline Glassy Polymers

这个为期三年的奖项支持美国-法国合作社 Benny D的研究北卡罗来纳州弗里曼 大学的Claudine诺埃尔和学校的Claudine 法国巴黎物理与工业化学。的 主链型液晶高分子的研究 （LCP）。 研究人员建议确定 系统结构变化对相形态、热 渗透剂的吸附和传输性能 的LCP。 LCP提供作为耐热或耐化学性屏障的前景 可能用于化学品的薄膜和涂层 加工业。 最近对LCP的研究表明， 这些材料是最不渗透的屏障之一 目前可用的聚合物。 然而，实际上 困难限制了迄今为止研究的成功， 解耦化学和形态学对 小分子的传输特性通过这些 聚合物 调查人员建议， 了解LCP的分子结构对 渗透剂的吸附和传输性能，反过来， 决定了它们的高阻隔性能。 在北卡罗来纳州 状态下，吸附和传输性能的小 将研究这些聚合物中的分子;然而， 法国研究小组将对 表征和它们的热性质。 小说 用于本研究的聚合物材料将由 赫斯特塞拉尼斯和迈尔斯实验室。 协作 利用调查人员的专业知识， 解决这一问题的补充办法。

This three-year award supports U.S.-France cooperative research between Benny D. Freeman of North Carolina State University, and Claudine Noel of the Ecole Superieure for Physics and Industrial Chemistry in Paris, France. The research focuses on mainchain liquid crystalline polymers (LCPs). The investigators propose to determine the effect of systematic structure changes on phase morphology, thermal properties, and penetrant sorption and transport properties of LCPs. LCPs offer promise as thermal or chemical resistant barrier films and coatings of potential use to the chemical processing industry. Recent studies of LCPs suggest that these materials are among the most impermeable barrier polymers currently available. However, practical difficulties have limited the success of studies to date in decoupling chemical and morphological effects on the transport properties of small molecules through these polymers. The investigators propose to advance understanding of the effects of LCPs' molecular structure on penetrant sorption and transport properties and, in turn, determine their high barrier properties. At North Carolina State, the sorption and transport properties of small molecules in these polymers will be studied; whereas, the French research group will conduct studies on characterization and their thermal properties. The novel polymeric materials for this study will be provided by Hoechst Celanese and Miles Laboratories. The collaboration takes advantage of the expertise of the investigators and complementary approaches to this problem.