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

该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（Henry Hall），日本合作者是日本大阪大学的北山达木（Tatsuki Kitayama）。他们将研究由4元碳环单体合成的新型立体规则聚合物。这些聚合物很容易与自由基或阴离子引发剂发生聚合。它们也能与乙烯基单体共聚。新的聚合技术，如ATRP和路易斯酸辅助阴离子聚合将应用于这些应变单体。这些聚合物将被评价为高温聚合物光纤、解拉链干扰元件、透镜、手性分辨柱等。具有更可控结构的聚合物将导致性能增强，因此用途更复杂。此外，它们具有非常理想的物理性质，包括光学清晰度，高玻璃化转变温度，应该对高科技应用有用。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的影响的信息。该项目汇集了两个具有互补专业知识和研究能力的实验室的努力。美国的研究人员在控制自由基聚合方面有专长，日本的研究人员在控制阴离子聚合方面有专长，他们在利用核磁共振光谱分析聚合物结构方面也有很高的专长。这些共同的努力将导致各种新的聚合物加工性能，并增加对自由基和阴离子聚合的理解。该项目通过一名博士后和一名本科生的参与来促进国际人力资源的发展。通过思想和技术的交流，该项目将扩大我们的基础知识基础，促进国际了解与合作。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.