Multifunctional Polymer Networks Crosslinked via Covalent Organic Cages

通过共价有机笼交联的多功能聚合物网络

• 批准号: 530500730
• 负责人: Dr. Niklas Grabicki
• 金额: --
• 依托单位: Department of Chemistry
• 依托单位国家: 德国
• 项目类别: WBP Fellowship
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/530500730?language=en
• 关键词: Multifunctional; Polymer; Networks; Crosslinked; via

The proposed research project deals with the development of new crosslinked polymers, bearing separated defined chemical environments. These chemical environments will further enable the introduction of different functionality. To make this possible, a completely new type of crosslinking is being tested. Instead of equipping polymer chains exclusively with chemically reactive groups, special geometric structures are incorporated as end groups of the polymer chains. These molecular end groups can react according to the principles of dynamic covalent chemistry to form diverse molecular cage structures. Thus the resulting polymer networks will have cage structures as linkages. The preparation of catalytically active polymer materials based on metal-organic cage compounds (metal=palladium) has already been successfully tested by the research group of Prof. Johnson and co-workers. The approach I have chosen allows the construction of all-organic materials and the introduction of two different cages into the same material. This type of cross-linking allows to tailor material properties such as viscoelasticity over a broader spectrum compared to what is usually achieved. The reason for this is the high number of polymer chains that are linked together at one cross-linking node. By clever choice of the molecular structures used at the ends of the polymer chains, it must be possible to build at least two different cage structures within the same polymer network. If this is successful, the number of non-elastic network defects can be drastically reduced, which would enable material properties much closer to the theoretical limit. In a final step, the different but defined chemical environments inside the cage linkages will be equipped with additional functionality. Thereby, it should be possible to integrate functionalities into the polymer networks that would not be compatible without the localization inside the cages.

拟议的研究项目涉及新的交联型聚合物的开发，具有分离的明确的化学环境。这些化学环境将进一步促进不同功能的引入。为了实现这一点，一种全新的交联剂正在测试中。不是专门用化学反应基团来装备聚合物链，而是将特殊的几何结构并入作为聚合物链的端基。这些分子端基可以根据动态共价化学原理进行反应，形成不同的分子笼状结构。因此，得到的聚合物网络将具有笼形结构作为连接。基于金属有机笼状化合物(金属=钯)的催化活性聚合物材料的制备已经由Johnson教授及其同事的研究小组成功地进行了测试。我选择的方法允许建造全有机材料，并将两个不同的笼子引入相同的材料中。这种类型的交联允许在比通常实现的范围更广的范围内定制材料特性，如粘弹性。这是因为在一个交联节上连接在一起的聚合物链的数量很多。通过巧妙地选择在聚合物链末端使用的分子结构，必须能够在同一聚合物网络中建立至少两个不同的笼形结构。如果成功，非弹性网络缺陷的数量将大大减少，这将使材料性能更接近理论极限。在最后一步中，笼形连杆内部不同但已定义的化学环境将配备额外的功能。因此，应该可以将功能集成到聚合物网络中，如果没有笼子内部的定位，这些功能将不兼容。