Characterisation of dynamic mechanical behaviour of magnetoelastomers

Abstract

Dynamic mechanical analysis experiments were conducted on various magnetoelastomers. The dynamic mechanical behaviour was characterised in terms of dynamic, storage and loss modulus values over a wide frequency and dynamic amplitude range with and without a magnetic field. Magnetoelastomers with different matrix hardness were produced with and without the application of a magnetic field. The curing in magnetic fields results in an oriented, chain-like particle structure and thus a highly anisotropic material behaviour. Furthermore, significantly higher storage modulus values were measured for anisotropic materials with a simultaneously higher viscoelastic loss factor and tan δ values. Moreover, the influence of the magnetic field is much more pronounced for anisotropic magnetoelastomers than for isotropic ones.