Linear Constitutive Model for Electromechanical Transduction in Ionic Polymer Materials

摘要

A linear electromechanical model has been developed for a class of active materials fabricated from ionomeric polymers. A series of experiments are performed to assess the validity of an equivalent circuit model for ionic polymer transducers. The fundamental parameters of the model are the dielectric permittivity of the material, the viscoelastic modulus, and the effective strain coefficient of the transducer. In this work we present experimental results which highlight the key features of the linear electromechanical model. Our results demonstrate the importance of modeling the frequency-dependence of both the electric permittivity and the strain coefficient. Both of these material parameters exhibit strong frequency dependence below the maximum frequency range of the model tested (20 Hz).