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  • Title: Modeling the polydomain-monodomain transition of liquid crystal elastomers.
    Author: Whitmer JK, Roberts TF, Shekhar R, Abbott NL, de Pablo JJ.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2013 Feb; 87(2):020502. PubMed ID: 23496448.
    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.
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