聚合物多级微相结构及其力学性能研究

具有复杂拓扑结构的高分子共聚物在一定条件下通过微相分离可形成多级微相结构，研究多级微相分离行为对于掌握多级结构的形成规律以及利用多级结构设计获得高性能功能材料具有重要意义。本申请课题首先通过分子设计，合成具有不同拓扑结构的多组分共聚物。然后，运用实验和理论模拟相结合的方法，研究共聚物的拓扑结构和链段相互作用等因素与其所形成的多级结构之间的关系，明确相关机理。 在此基础上，开展具有多级微相结构的高分子材料的力学性能研究，明确高分子多级结构与力学性能之间的关系。通过上述研究，实现从分子设计到微相结构设计再到力学性能的可控，为通过调控聚合物的多级结构获得高性能结构与功能材料奠定基础。

Copolymers with sophisticated topologies are capable of microphase-separating into various hierarchical microstructures under certain conditions. Nanomaterials with hierarchical microstructures usually exhibit more advanced macroscopic properties than those with traditional microstructures such as lamellae, and therefore they may find promising applications in various fields. The results gained through the related studies may provide useful information to understand the nature of hierarchical microphase separation and to design high-performance functional materials. In this proposal, firstly a series of copolymers with various topologies will be designed and synthesized through molecular engineering and the structures of the samples will be characterized. Then, through combining the experimental observations and theoretical simulations, we intend to investigate the influences of the molecular topologies and intermolecular interactions on the hierarchical microphase separation, and unveil the underlying mechanisms. Finally, we will carry out studies on the mechanical properties of these materials with hierarchical microstructures. The effects of different microstructures will be examined to unveil the principle governing the mechanical properties. Through above investigations, we intend to fulfill the objective, i.e., to gain controllable microstructures and controllable properties through molecular design of copolymers.