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Molecular Architecture Effects on Self-Ordering, Self-Assembled Poly(ethylene oxide) and Copoly(ethylene oxide) Systems

分子结构对自有序、自组装聚环氧乙烷和共聚环氧乙烷系统的影响

基本信息

批准号：
9617030
负责人：
Stephen Z. Cheng
金额：
$ 40.8万
依托单位：
University of Akron
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1997
资助国家：
美国
起止时间：
1997-03-01 至 2002-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9617030&HistoricalAwards=false
关键词：
Molecular Architecture Effects Self Ordering

项目摘要

Cheng 9617030 This grant is funded to study the effect of molecular architecture on the self-ordering and self-assembly mechanisms in a series of well defined crystalline poly(ethylene oxide)s (PEOs) and their diblock copolymers having novel molecular and supra-molecular structures. In particular, molecular architecture can be controlled by synthesizing different molecular shapes and conformations. The two-arm PEOs provide an opportunity to study the defect effect at the center of the chain molecules compared with linear PEOs having twice the molecular length of each arm, while three- and four-arm star-PEOs serve as model compounds for study of the molecular shape dependence on the self- ordering and self-assembly process. Furthermore, it is interesting to study transition behaviors and morphological changes for two-arm PEOs having different linkage positions at the coupling agents. This research can be extended to the investigation of supra-molecular structural dependence on the process via diblock copolymers containing crystallizable PEO components. %%% It is believed that these studies of controlled molecular architecture in both the star-PEOs and diblock copolymers will provide significant new experimental evidence for achieving further understanding in the research are of polymer crystallization.

城9617030 该基金资助研究分子结构对一系列具有新颖分子和超分子结构的结晶聚氧化乙烯（PEO）及其二嵌段共聚物的自有序和自组装机制的影响。特别地，可以通过合成不同的分子形状和构象来控制分子结构。与具有每个臂的分子长度的两倍的线性PEO相比，双臂PEO提供了研究链分子中心处的缺陷效应的机会，而三臂和四臂星形PEO用作模型化合物用于研究分子形状对自有序和自组装过程的依赖性。此外，它是有趣的，研究的转变行为和形态变化的双臂聚氧乙烯具有不同的连接位置的偶联剂。这项研究可以扩展到调查的超分子结构的依赖性的过程中，通过二嵌段共聚物含有可结晶的PEO组分。我们相信，这些研究的控制分子结构在这两个星型聚氧化乙烯和二嵌段共聚物将提供重要的新的实验证据，以实现进一步了解在研究中的聚合物结晶。