Modeling the polydomain-monodomain transition of liquid crystal elastomers

被引：20

作者：

Whitmer, Jonathan K. ^{[1
]}

Roberts, Tyler F. ^{[1
]}

Shekhar, Raj ^{[1
]}

Abbott, Nicholas L. ^{[1
]}

de Pablo, Juan J. ^{[2
,3
]}

机构：

[1] Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA

[2] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA

[3] Argonne Natl Lab, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW E | 2013年 / 87卷 / 02期

基金：

美国国家科学基金会;

关键词：

NEMATIC ELASTOMERS; PHASE-BEHAVIOR; DEFORMATION; SIMULATIONS; DYNAMICS; DISORDER; FIELD;

D O I：

10.1103/PhysRevE.87.020502

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：

We study the mechanism of the polydomain-monodomain transition in liquid crystalline elastomers at the molecular scale. A coarse-grained model is proposed in which mesogens are described as ellipsoidal particles. Molecular dynamics simulations are used to examine the transition from a polydomain state to a monodomain state in the presence of uniaxial strain. Our model demonstrates soft elasticity, similar to that exhibited by side-chain elastomers in the literature. By analyzing the growth dynamics of nematic domains during uniaxial extension, we provide direct evidence that at a molecular level the polydomain-monodomain transition proceeds through cluster rotation and domain growth. DOI: 10.1103/PhysRevE.87.020502

引用

页数：5

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