Synthetic Applications of Non-(Homo) Polymerizable Monomers in Living Carbocationic Polymerization

9806418除了控制相对分子质量及其分布外，大分子工程的最终目标是对影响大分子物理性质的组成和结构变量进行高度控制。在这些活动中，人们对线性和非线性嵌段结构的设计和建造越来越感兴趣，例如接枝、梳状、环状、星形或H型聚合物，它们自组装成有序的纳米结构。活性阳离子聚合的最新进展，加上使用非(均)可聚合单体开发的方法，提供了对这些材料的分子结构的前所未有的控制水平。该项目继续由NSF DMR资助的研究，在活性阳离子聚合中使用非(均)可聚合单体合成、表征和物理性能新型的线性和非线性嵌段结构。这些活动将通过持续的动力学和机械学研究得到加强，特别强调使用低分子量模型系统与高分子量类似物相比较。上述新型材料将作为模型聚合物，通过跨学科的研究活动，促进对大分子结构/性能关系的基本了解，从而开发出具有优异性能的材料。***

9806418 Faust In addition to the control of molecular weights and their distributions, the ultimate goal of macromolecular engineering is to obtain a high degree of control over compositional as well as structural variables which affect the physical properties of macromolecules. Among these activities there has been growing interest on the design and construction of linear and non-linear block architectures, such as graft, comb, ring, star, or H-shaped polymers, that self-assemble into ordered nano-structures. Recent advances in living cationic polymerization coupled with methodologies developed using non-(homo)polymerizable monomers offer an unprecedented level of control over the molecular architecture of these materials. This project continues research funded by NSF DMR on the synthesis, characterization and physical properties of novel linear and non-linear block architectures using non-(homo)polymerizable monomers in living cationic polymerization. These activities will be augmented with continued kinetic and mechanistic studies with special emphasis on addressing the use of low molecular weight model systems in comparison to high molecular weight analogs. %%% The above novel materials will serve as model polymers to advance fundamental understanding in structure/property relationship of macromolecules through interdisciplinary research activities, to enable the development of materials with superior properties. ***