Thermoreversible, epitaxial fcc ⇆ bcc transitions in block copolymer solutions -: art. no. 215505

被引：57

作者：

Bang, J

Lodge, TP

Wang, XH

Brinker, KL

Burghardt, WR

机构：

[1] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA

[2] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

[3] Northwestern Univ, Dept Chem Engn, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.89.215505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Uncharged block copolymer micelles display thermoreversible transitions between close-packed and bcc lattices for a range of concentration, solvent selectivity, and copolymer composition. Using small-angle x-ray scattering on shear-oriented solutions, highly aligned fcc crystals are seen to transform epitaxially to bcc crystals, with fcc/bcc orientational relationships that are well established in martensitic transformations in metals. The transition is driven by decreasing solvent selectivity with increasing temperature, inducing solvent penetration of the micellar core.

引用

页数：4

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[11] PHASE-DIAGRAM FOR THE INVERSE 6TH-POWER POTENTIAL SYSTEM FROM MOLECULAR-DYNAMICS COMPUTER-SIMULATION [J].