Abstract
It has recently been theorized that the initial fast electromechanical response of ionicpolymer–metal composites (IPMCs) may be due to a polarization mechanism, whiletransport dominates the relaxation response. In order to investigate this hypothesis, acomputational micromechanics model has been developed to model polarization responsein these ionomeric transducers. Assuming a constant solvated state, the modeltracks the rotation of individual dipoles within a given cluster in response todipole–dipole interaction, mechanical stiffness of the pendant chain, and externalloading. External loading may take the form of imposed cluster distortion orapplied electrical field. Once the system of dipoles reaches equilibrium in responseto loading, net polarization/distortion response is recorded as appropriate tothe loading condition. Actuation predictions using the polarization model areconsistent with the experimentally observed fast response of these materials.
Published Version
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