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Modeling the polydomain-monodomain transition of liquid crystal elastomers.


ABSTRACT: 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.

SUBMITTER: Whitmer JK 

PROVIDER: S-EPMC4434589 | biostudies-literature | 2013 Feb

REPOSITORIES: biostudies-literature

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Modeling the polydomain-monodomain transition of liquid crystal elastomers.

Whitmer Jonathan K JK   Roberts Tyler F TF   Shekhar Raj R   Abbott Nicholas L NL   de Pablo Juan J JJ  

Physical review. E, Statistical, nonlinear, and soft matter physics 20130213 2


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 dynam  ...[more]

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