Hierarchical coarsening in the late stage of viscoelastic phase separation

被引：6

作者：

Shi, Weichao ^{[1
]}

Liu, Wei ^{[1
]}

Yang, Jian ^{[1
]}

He, Zhiyuan ^{[1
]}

Han, Charles C. ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Joint Lab Polymer Sci & Mat, Inst Chem, Beijing 100190, Peoples R China

来源：

SOFT MATTER | 2014年 / 10卷 / 15期

基金：

中国国家自然科学基金;

关键词：

CRITICAL POLYMER MIXTURE; BINARY-FLUID MIXTURE; SPINODAL DECOMPOSITION; BLENDS; FLUCTUATIONS; DYNAMICS; GROWTH; CRYSTALLIZATION; PERCOLATION; SCATTERING;

D O I：

10.1039/c3sm52713a

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：

Coarsening is a general phenomenon in phase separating mixtures. In this study, we report a hierarchical coarsening at different length scales. Dispersed domains grew by direct combination of two/three small ones while some small domains can survive for a long time. The small angle laser light scattering showed that the scattered intensity exhibited multiple "decay-growth" transitions in the coarsening process. The evolution of the main peak gave a characteristic power law index of about -3/4, which is much faster than the -1/3 relationship from the traditional theories. We propose that relaxation and hydrodynamic flow play important roles in this process.

引用

页码：2649 / 2655

页数：7

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