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.

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页码：145501 / 1

页数：4

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