Fluctuation effects and the stability of the Fddd network phase in diblock copolymer melts

被引：23

作者：

Miao, Bing ^{[1
]}

Wickham, Robert A. ^{[1
]}

机构：

[1] St Francis Xavier Univ, Dept Phys, Antigonish, NS B2G 2W5, Canada

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 128卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.2827472

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We examine the effect of composition fluctuations on the stability of the orthorhombic Fddd network phase in the diblock copolymer melt phase diagram within the self-consistent Hartree approximation to the Landau-Brazovskii theory. For weak fluctuations, the Fddd structure is an equilibrium phase; however, stronger fluctuations render this phase metastable. These results suggest a reinterpretation of a recent experiment beyond mean-field theory. Fluctuations may also explain why an equilibrium Fddd phase is not generally observed in analogous self-assembling systems. (c) 2008 American Institute of Physics.

引用

页数：5

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