Well-Controlled Polymer Structures via Metathesis Polycondensation Chemistry

通过复分解缩聚化学控制良好的聚合物结构

• 批准号: 9806492
• 负责人: K. Wagener
• 金额: $ 32.4万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9806492&HistoricalAwards=false
• 关键词: Well; Controlled; Polymer; Structures; via

9806492 Wagener This award addresses several specific research goals. A series of well defined polyolefin polymers will be designed to model the crystallization behavior of polyethylene and its related copolymers, including the new metallocene materials. The synthesis concept has already been reduced to practice, so the likelihood of success in this research is high. This will be done by implementing total control over the identity and frequency of branches along the backbone. Inherent in this research will be work to elaborate on new homogeneous-to- heterogeneous metathesis/hydrogenation chemistry. Well- defined alcohol and ester branched polymers will be synthesized to serve as polymeric substrates in a sialyl Lewis X tetrasaccharide drug binding study. This work will be done in collaboration with Prof. Wong of the Scripps Research Institute. Precise segmented polymers will be synthesized by condensation metathesis. Segmented multiphase materials can only be made by step polymerization procedures, making the ADMET reaction a natural choice for this conversion. This synthetic strategy has already been demonstrated, and the preparation of useful hard segments will be explored using polyether, polysiloxane, and polyisobutylene soft segments. Well defined, mixed metal rich homopolymers will be prepared possessing different metals covalently fixed within the same polymer chain. %%% While covalently bound metal containing polymers have already been synthesized via condensation metathesis, polymers with such high mixed metal content polymers are not known. Each of these areas provides significant opportunity for the training of postdoctoral, Ph.D. and undergraduate students for their future. Interaction with industry continues to be strong, and the information generated by this work will foster continuing relations with a number of corporations. The social impact of this research relates to broadening the usefulness of the world's largest volume, commo dity polymers and copolymers such as polyethylene, polystyrene and polyvinylacetate. ***

9806492瓦格纳该奖项涉及几个具体的研究目标。将设计一系列定义良好的聚烯烃聚合物来模拟聚乙烯及其相关共聚物的结晶行为，包括新的茂金属材料。综合概念已经被简化为实践，因此这项研究成功的可能性很高。这将通过对主干沿线分支机构的身份和频率实施全面控制来实现。这项研究的本质是详细阐述新的均相到多相的复分解/氢化化学。在唾液酸化Lewis X四糖药物结合研究中，将合成定义明确的醇和酯支化聚合物作为聚合物底物。这项工作将与斯克里普斯研究所的王教授合作完成。通过缩合复分解可合成高精度的嵌段聚合物。分段多相材料只能通过分步聚合过程获得，这使得ADMET反应成为这种转化的自然选择。这种合成策略已经被证明，并将探索使用聚醚、聚硅氧烷和聚异丁烯软段来制备有用的硬段。将制备具有不同金属共价固定在同一聚合物链中的定义良好的混合富金属均聚物。虽然已经通过缩合复分解合成了共价键合的含金属聚合物，但具有如此高混合金属含量的聚合物尚不为人所知。这些领域中的每一个都为培养未来的博士后、博士和本科生提供了重要机会。与行业的互动仍然很强，这项工作产生的信息将促进与一些公司的持续关系。这项研究的社会影响涉及扩大世界上最大的体积、共性聚合物和共聚物的用途，如聚乙烯、聚苯乙烯和聚乙酸乙烯酯。***