Dynamic mechanical behaviour of the magneto-sensitive elastomers in a homogeneous magnetic field

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Magneto-sensitive elastomers (MSE) is a relatively new class of functional polymer materials, the shape and mechanical properties of which can be easily changed upon application of a magnetic field. MSEs consist of micron-sized iron particles dispersed within an elastomeric matrix. In the last years the magneto-induced deformation of the MSEs has been studied successfully experimentally and theoretically. On the other side, there are only a few microscopic approaches for description of the static MSE moduli. The applicants do not know any microscopic models for description of the dynamic-mechanical moduli under application of a magnetic field. Understanding of the dynamic properties of this class of materials is however extremely important for their multiple technical applications, in which the external mechanical loading depends on the amplitude and frequency.The aim of this project is to develop and to validate a first microscopic approach for description of dynamic mechanical properties of the MSEs under application of a homogeneous magnetic field. The matrix properties will be described using a simple cubic network model. To consider different spatial distributions of magnetic particles, a number of lattice models considered in our previous studies as well as stochastically generated distributions will be used. It is planned to investigate the dynamic behavior of the MSEs with isotropic and anisotropic particle distributions at low and intermediate frequencies and to compare it with experimental findings.