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Strain-induced transitions in liquid-crystal elastomers

1993; American Physical Society; Volume: 71; Issue: 18 Linguagem: Inglês

10.1103/physrevlett.71.2947

1092-0145

Geoffrey R. Mitchell, Fred J. Davis, Wei Guo,

Cellular Mechanics and Interactions

A novel strain-induced transition of the director orientation in a monodomain cross-linked side-chain liquid-crystal polymer system is reported which is analogous to the Fr\'eedericksz transition in simple nematics. This new type of transition has a characteristic threshold strain which arises from an internal elastic barrier to rotation and is related to the level of anisotropy of the polymer chain trajectory.