Development of Novel Properties in Block Copolymer Systems

嵌段共聚物体系新性能的开发

• 批准号: 9807591
• 负责人: Edwin Thomas
• 金额: $ 33.6万
• 依托单位: Massachusetts Institute of Technology
• 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: 1998-08-01 至 2001-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9807591&HistoricalAwards=false
• 关键词: Development; Novel; Properties; Block; Copolymer

9807591 Thomas This proposal describes a research program aimed at developing novel macromolecular materials for technological applications. The first area is traditional: morphology and mechanical properties; and the second is completely new: block copolymer photonic band gap (PBG) materials. Both areas depend critically on the ability to organize block copolymers into well ordered microdomain morphologies using composition, molecular architecture, and careful processing. Tailored self assembly into new microdomain structures such as the double gyroid tricontinuous structure in ABA triblocks is exemplary for understanding how the microdomain structure of a glassy continuous (polystyrene end blocks) and a rubber continuous (polyisoprene mid block) system evolves with increasing deformation and substantially recovers upon release of the applied load. The continued exploration of ABC terpolymers, both linear and miktoarm stars, will undoubtedly reveal additional new microdomain structures. The object is to gain an overall understanding of how composition, number of components and chain architecture govern the resultant structure of the intermaterial dividing surface of the periodic microdomains. In the second area, a new field will be explored, of potentially huge significance for block copolymer materials and their interesting topologically connected microdomains by using them in combination with high dielectric contrast nanoparticles to create novel photonic band gap materials. PBG materials are a new class of materials with enormous potential to revolutionize electroptical and all optical applications. Up to the present, this new field has been pioneered using microlithography to pattern periodic dielectric structures. By sequestering nanoparticles into one of the components of an appropriately high Mw block copolymer, structures with excellent dielectric contrast and appropriate length scale can b produced to control the flow of U.V. and visible li ght. %%% These two projects are in the areas of polymer-based structures for technological applications. In addition to the basic science and new technology, both graduate students and undergraduate students will be exposed to multidisciplinary training in these exciting project thrust areas. ***

9807591托马斯 该提案描述了一项旨在开发用于技术应用的新型高分子材料的研究计划。 第一个领域是传统的：第二个是全新的：嵌段共聚物光子带隙（PBG）材料。 这两个领域都依赖于使用组合物、分子结构和仔细加工将嵌段共聚物组织成有序微区形态的能力。 定制的自组装成新的微区结构，例如阿坝三嵌段中的双螺旋三连续结构，对于理解玻璃态连续（聚苯乙烯端嵌段）和橡胶连续（聚异戊二烯中间嵌段）系统的微区结构如何随着变形的增加而演变以及如何随着变形的增加而演变是一个典范。施加的负载释放后基本上恢复。 ABC三元共聚物的继续探索，无论是线性和miktoarm星，无疑将揭示更多的新的微区结构。 我们的目标是获得一个全面的了解如何组成，数量的组件和链架构管理所得结构的周期性微区的材料间划分表面。 在第二个领域中，将探索一个新的领域，通过将它们与高介电对比度纳米颗粒结合使用，对嵌段共聚物材料及其有趣的拓扑连接微区具有潜在的巨大意义，以创建新型光子带隙材料。 光子带隙（PBG）材料是一类具有巨大潜力的新型材料，它将彻底改变电光和全光应用。 到目前为止，这一新的领域已率先使用微光刻图案周期性介电结构。 通过将纳米颗粒螯合到适当高Mw嵌段共聚物的组分之一中，可以产生具有优异介电对比度和适当长度尺度的结构以控制UV和可见光的流动。 这两个项目属于聚合物基结构的技术应用领域。 除了基础科学和新技术，研究生和本科生都将在这些令人兴奋的项目推力领域接受多学科培训。 ***