Origin of the thermoreversible fcc-bcc transition in block copolymer solutions

被引：84
|
作者：
Lodge, TP
Bang, J
Park, MJ
Char, K
机构：
[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
[2] Seoul Natl Univ, Sch Chem Engn, Seoul 151744, South Korea
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 14期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.92.145501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The thermoreversible, fcc-bcc transition in concentrated block copolymer micellar solutions is shown to be driven by decreases in the aggregation number as the solvent penetrates the core, leading to a softer intermicelle potential. Small-angle neutron scattering measurements in a dilute solution are used to quantify the temperature-dependent micellar characteristics. The observed phase boundary is in excellent agreement with recent simulations of highly branched star polymers.
引用
收藏
页码：145501 / 1
页数：4
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