Nanostructure Synthesis using Reactive Block Copolymers

本提案中描述的职业发展计划侧重于二嵌段共聚物，这是一类混合大分子，代表了一组非常有趣的自组装材料，具有广泛的应用。双嵌段共聚物是一种简单的大分子，由两段化学性质不同的单体通过一个共价键连接而成。这一键阻止了两个聚合物片段的大相分离，并根据单体的性质、链的分子量和少数组分的体积分数，导致了各种纳米级组装的形成。虽然它们作为热塑性弹性体、压敏粘合剂和增容剂的用途广泛，但直到最近，纳米级的组成异质性才被用于制备其他纳米结构材料。研究了一种利用有序嵌段共聚物模板制备纳米多孔材料的策略。本研究的最终目标是制备聚合物单体，该聚合物单体含有排列整齐的纳米孔，具有狭窄的孔径分布和极高的孔隙密度。提出了从有序嵌段共聚物开始制备多孔材料的两种一般策略。一种利用嵌段共聚物与可降解的嵌段，另一种利用嵌段的一系列有趣的纳米材料。本提案中描述的工作取决于聚合物合成，超分子自组装和表征以及有序嵌段共聚物的固态化学的结合。纳米尺度结构的科学和技术是许多研究活动的核心。本提案中描述的研究解决了一个将对纳米结构模板和支架的发展产生重大影响的领域，用于设计和合成新的纳米材料。目标材料在纳米结构支架、分离介质和光学器件方面具有显著的潜力。此外，该计划还包括关于综合研究和教育活动的一节。提出的教育计划主要包括两个方面。第一个侧重于高分子科学领域的研究生教育，第二个侧重于大一阶段的本科教育和成人继续教育。

The career development plan described in this proposal focuses on diblock copolymers, a class of hybrid macromolecules that represent an extremely interesting set of self-assembling materials with a wide variety of applications. Diblock copolymers are simple macromolecules consisting of two segments of chemically distinct monomers connected by one covalent bond. This one bond prevents macrophase separation of the two polymeric segments and leads to the formation of a variety of nanoscopic assemblies depending on the nature of the monomers, the molecular weight of the chain, and minority component volume fraction. While their uses as thermoplastic elastomers, pressure sensitive adhesives, and compatibilizing agents are wide spread, it has only been recently that the nanoscopic compositional heterogenties have been exploited for the preparation of other nanostructured materials. A strategy for the preparation of nanoporous materials using ordered block copolymers templates will be investigated. The ultimate of this research goal is the preparation of polymeric monoliths that contain aligned nanopores with a narrow pore size distribution and an extremely high pore density. Two general strategies for the preparation of porous materials starting from ordered block copolymers are presented. One utilized block copolymers with a degradable block and the other utilized block of an array of interesting nanomaterials. The work described in this proposal depends on the combination of polymer synthesis, supramolecular self-assembly and characterization, and solid-state chemistry of ordered block copolymers.%%%The science and technology of structures on the nanometer length scale is central to many research initiatives. The research described in this proposal addresses an area that will have significant impact on the development of nanostructured templates and scaffolds for the design and synthesis of new nanomaterials. The target materials will have remarkable potential as nanostructure scaffolds, separation media, and optical devices. Furthermore, this plan also includes a section on integration research and educational activities. There are two primary aspects the proposed educational plan. The first is focused on graduate education in the field of polymer science, and the second is centered around undergraduate education at the Freshman level and adult continuing education.