U.S.-Japan Cooperative Science: New Stereoregular Polymers from 4-Membered Carbocyclic Monomers

这个奖项支持一个为期两年的国际合作研究项目。该项目的首席研究员是亚利桑那大学的亨利·霍尔，日本合作者是日本大阪大学的北山达树。他们将从四元碳环单体中研究新的立体规则聚合物。这些聚合物很容易与自由基或阴离子引发剂聚合。它们还与乙烯基单体共聚。新的聚合技术，如ATRP和Lewis酸辅助阴离子聚合将被应用于这些应变单体。这些聚合物将被评估为高温聚合物光纤、拉链解锁部件、透镜、手性拆分柱等。具有更可控结构的聚合物将导致性能增强，从而实现更复杂的用途。此外，它们还具有非常理想的物理性能，包括光学清晰度、高玻璃化转变温度，应可用于高科技应用。对这些聚合物的详细核磁共振研究将提供有关特定聚合条件对分子聚合物结构影响的信息。该项目汇集了两个拥有互补专业知识和研究能力的实验室的努力。美国的研究人员在受控自由基聚合方面拥有专业知识，日本人在受控阴离子聚合方面拥有专家，他们在利用核磁共振光谱进行聚合物结构分析方面也拥有很高的专业知识。这些共同努力将导致各种新的聚合物加工性能，并增加对自由基聚合和阴离子聚合的理解。该项目通过博士后和本科生的参与促进了国际人力资源的发展。通过思想和技术的交流，这个项目将扩大我们的基础知识基础，促进国际理解与合作。研究结果将在科学会议和科学期刊上传播。

0244260HallThis award supports a two-year international collaborative research project. The principal investigator for the project is Henry Hall at the University of Arizona and the Japanese collaborator is Tatsuki Kitayama at Osaka University in Japan. They will be undertaking research on new stereoregular polymers from 4-membered carbocyclic monomers. These polymers readily undergo polymerization with radical or anionic initiators. They also copolymerize with vinyl monomers. New polymerization techniques such as ATRP and Lewis acid assisted anionic polymerization will be applied to these strained monomers. The polymers will be evaluated as high temperature polymer optical fibers, unzipper-jamming components, lenses, chiral resolving columns, etc. Polymers with more controlled structures will lead to enhanced properties, and therefore more sophisticated uses. In addition, they possess highly desirable physical properties including optical clarity, high glass transition temperatures and should be useful for high-tech applications. Detailed NMR studies of these polymers will provide information about the effect of specific polymerization conditions on the molecular polymer structure. The project brings together the efforts of two laboratories that have complementary expertise and research capabilities. The U. S. researchers have expertise in controlled radical polymerization and the Japanese are experts at controlled anionic polymerization and they also have high expertise in the field of structure analysis of polymers using NMR spectroscopy. These joint efforts should lead to a variety of novel polymers processing properties and to increased understanding of both free radical and anionic polymerization. The project advances international human resources through the participation of a postdoc and an undergraduate student. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. Results of the research will be disseminated at scientific meetings and in scientific journals.