Abstract
We have investigated thermo-mechanical properties and optical birefringence of the V3 cross-linker liquid single crystal elastomers (V3LSCEs) with different concentrations of the flexible tri-functional cross-linker as a function of temperature. The length of V3LSCEs along the director n ˆ shrinks on heating while it expands perpendicular to n ˆ . Drastic length changes as well as large variations in the optical birefringence, Δ n, are observed near T c. The maximum contraction increases with increasing cross-linking concentration. When the anisotropy of the shape change is plotted as a function of Δ n, a linear dependence is observed only deep in the nematic phase for larger cross-linking concentrations.
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