Temperature dependent magneto-mechanical properties of magnetorheological elastomers

Temperature is one of the biggest influencing factors affecting the performance of polymer composites. The study on the temperature-dependent mechanical properties of magnetorheological (MR) elastomers is very necessary for its practical application. In this work, the dynamic and static mechanical properties of anisotropic MR elastomers were investigated under different temperatures. The results showed that both the initial modulus and the magnetic-induced modulus of MR elastomers decreased with increasing temperature. The variation of magnetic-induced modulus with temperature indicated the temperature-dependent rotation of particle chain inside the MR elastomers. The expression of magnetic-induced modulus as a function of the magnetic field and initial modulus was obtained by the theoretical analysis of the temperature-dependent rotation. It was found that when the magnetic field was constant, the reciprocal of the magnetic-induced modulus was linearly related to the reciprocal of the initial modulus at the corresponding temperature, which agreed well with the experimental result.