期刊
POLYMER
卷 121, 期 -, 页码 297-303出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2017.06.007
关键词
Order-to-disorder transition; Polymer chain architecture; Entropy; Salt doping; Star copolymer
资金
- U.S. Department of Energy BES [BES-DE-FG02-96ER45612]
- Army Research Office through a MURI award [W911NF-10-1-0520]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
Using salt-doped polystyrene-b-poly(2-vinylpyridine) star shaped block copolymer as a model, we show that the architecture of (A-b-B)(n) type multi-arm star block copolymers enhances the ordering of the block copolymers, enabling the generation of nanostructures with microdomain periods less than 10 nm. The influence of the arm number on the order-to-disorder transition temperature and molecular weight was systematically studied using small angle X-ray scattering. The configurational constraints placed on the chains by anchoring each block copolymer to a central junction point have a significant effect on the disorder-to-order transition behavior. In addition to an increase in the Flory-Huggins parameter (chi), block copolymers with multi-arm star shape chain architecture have a critical segregation strength (chi N) C that decreases with arm number, opening a simple route to generate ordered nanostructures with periods below 10 nm. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据