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Pattern formation in phase-separating gels with spontaneous shear

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons48891

Uchida,  N.
MPI for Polymer Research, Max Planck Society;

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Uchida, N. (2002). Pattern formation in phase-separating gels with spontaneous shear. Physical Review Letters, 89(2): 025702, pp. 025702-025702.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-65A1-3
Abstract
We study pattern formation in gels undergoing simultaneous phase separation and orientational ordering. A 2D numerical simulation is performed using a minimal model of nonlinear elasticity with density-anisotropy coupling. For strong positive coupling, the collapsed phase elongates along the phase boundary and buckle, creating a folded structure with paired topological defects. For negative coupling, soft elasticity of the swollen phase causes a droplet morphology as in liquid-liquid phase separation. Their possible realizations in nematic liquid-crystalline gels are discussed.