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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Poster: (Hydrogels) and Elastomers
CPP 27.9: Poster
Mittwoch, 28. März 2012, 11:00–13:00, Poster A
Microscopic modelling of magneto-sensitive elastomers: lattice approaches — •Dmytro Ivaneyko1,2, Vladimir Toshchevikov2, Marina Saphiannikova2, and Gert Heinrich1,2 — 1Institute of Materials Science, Technical University of Dresden, 7 Helmholtz Str., 01069 Dresden, Germany — 2Leibniz Institute of Polymer Research Dresden, 6 Hohe Str., 01069 Dresden, Germany
We propose a theory which describes the mechanical behaviour of magneto-sensitive elastomers (MSEs) under a uniform external magnetic field. We focus on the MSEs with isotropic spatial distribution of magnetic particles. A mechanical model is used in which magnetic particles are arranged on the sites of three regular lattices: simple cubic, body-centered cubic and hexagonal close-packed lattices. By this we extend our previous approach [1] which used only the simple cubic lattice for describing the isotropic spatial distribution of the particles. The magneto-induced deformation and the Young's modulus of MSEs are calculated as functions of the strength of the external magnetic field. We show that the magneto-mechanical behaviour of MSEs is very sensitive to the spatial distribution of the magnetic particles. MSEs can demonstrate either uniaxial expansion or contraction along the magnetic field and the Young's modulus can be an increasing or decreasing function of the strength of the magnetic field depending on the spatial distribution of the magnetic particles.
[1] Ivaneyko, D.; Toshchevikov, V.P.; Saphiannikova, M.; Heinrich, G., Macromolecular Theory & Simulations 2011, 20, 411-424