New Products and Processes by Carbocationic Polymerizations

这项资助的总体目标是通过采用廉价的单体/化学品和常规设备的新合成来制备独特的新颖的、潜在有用的聚合物材料。 合成方法涉及活性碳阳离子聚合（LC+Pzn）或LC+Pzn与其他技术的组合，并且基于最近产生的机理见解。 虽然重点始终是综合，结构/性能关系的阐明和机械测试的措施，以建议实用性是项目的重要组成部分。 该提案包括四个主要项目和许多附属项目：1。异丁烯和苯乙烯的活性阳离子共沸聚合及由此路线制备的异丁烯/苯乙烯共聚物。 2.有机/无机杂化星和网络的溶胶/凝胶化学。 3.活性阳离子聚合与自由基聚合相结合的新型热塑性弹性体。 4.新型两亲性膜的合成与表征（两个子计画）：A.化学交联膜，和B.物理交联膜。这些项目涉及新型原型材料的制备和研究，这些材料和研究表明可用于各种工程和生物材料应用;因此，对设计聚合物材料的知识进步可能产生重大影响。 这些项目将由聚合物科学领域的研究生进行。

The overall objective of this grant is the preparation of unique novel, potentially useful, polymeric materials by new syntheses employing inexpensive monomers/chemicals and conventional equipment. The synthesis methods involve living carbocationic polymerizations (LC+Pzn) or a combination of LC+Pzn with other techniques, and are based on recently generated mechanistic insight . While the emphasis is always on synthesis, the elucidation of structure/property relationships and a measure of mechanical testing to suggest utility are essential parts of the projects. The proposal consists of four main projects and numerous subordinate projects: 1. Living Cationic Azeotropic Copolymerization of Isobutylene and Styrene, and Isobutylene/Styrene Copolymers Prepared by this Route. 2. Organic/Inorganic Hybrid Stars and Networks by Sol/Gel Chemistry. 3. New Thermoplastic Elastomers by Combination of Living Cationic and Radical Polymerizations. 4. Synthesis and Characterization of Novel Amphiphilic Membranes (two subprojects): A. Chemically Crosslinked Membranes, and B. Physically Crosslinked Membranes.These projects concern the preparation of novel prototype materials and investigations suggesting utility for various engineering and biomaterials applications; therefore the potential impact on advancing knowledge in designed polymeric materials could be significant. The projects will be carried out by graduate students in polymer science.