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. 2016 Oct 7;7:13140. doi: 10.1038/ncomms13140

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Copyright © 2016, The Author(s)

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Experimental values of E (orange circles) and percentage strain 100(λ(T_room)−1) (brown circles) were measured for PDLCE-A at T_room as functions of LCE material fraction ν (a,c) and its relative elastic modulus y=E_LCE/E_PDMS (b,d). μLCE-A thermomechanical dopant exhibited λ_LCE(T_room)=1.45±0.05 strain and E_LCE=60±6 kPa Young's modulus. ν-dependence points were obtained with composites prepared with matrix material of Young's modulus E_PDMS=180±15 kPa, whereas y-dependence points were obtained by adjusting the PDMS matrix modulus E_PDMS via base/hardener composition at a constant ν=0.5, equivalently 50%, LCE fraction. Solid lines show the theoretical predictions from the ‘series' (light grey) and the ‘parallel' (black) model, with evidently favoured ‘parallel' scenario.