Dissipative particle dynamics study on the morphology changes of diblock copolymer lamellar microdomains due to steady shear

被引：23
|
作者：
Liu, Wei [1 ]
Qian, Hu-Jun [1 ]
Lu, Zhong-Yuan [1 ]
Li, Ze-Sheng [1 ]
Sun, Chia-Chung [1 ]
机构：
[1] Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130023, Peoples R China
来源：
PHYSICAL REVIEW E | 2006年 / 74卷 / 02期
关键词：
D O I：
10.1103/PhysRevE.74.021802
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The morphology changes of linear diblock copolymer lamellar microdomains under uniform simple shear are studied via the dissipative particle dynamics technique. The parallel and perpendicular reorientations of the lamellae are observed in the simulations, and two different reorientation mechanisms, under small and large shear rates respectively, are proposed. The parallel-to-perpendicular transition is also observed and the kinetics is discussed. Sinusoidal and chevron instabilities due to the shear are found. After relaxation the peculiar "bidirectionally undulating" instability is obtained.
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页数：9
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