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Dresden 2011 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Elastomers and Gels

CPP 14.5: Talk

Tuesday, March 15, 2011, 11:45–12:00, ZEU 114

Mechanical moduli of magneto-sensitive elastomers in a homogeneous magnetic field — •Dmytro Ivaneyko1,2, Vladimir Toshchevikov1, Marina Saphiannikova1, and Gert Heinrich11Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany — 2Technische Universität Dresden, ECEMP, Marschner Str. 39, 01307 Dresden, Germany

Magneto-sensitive elastomers (MSEs) are a class of smart materials whose mechanical properties can be controlled by application of an external magnetic field [1]. Recently, MSEs have been used in mechanical systems and automobile applications such as stiffness tunable mounts and suspension devices. In the present work, we develop the theory of mechanical properties of MSEs which takes into account a non-linear elasticity of a polymer matrix. Different spatial configurations of magnetic particles within the matrix are considered: homogeneous, chain-like and plane-like. It is shown that interaction between the magnetic particles results in the contraction of an elastomer along the direction of uniform magnetic field. With increasing magnetic field the shear modulus for the shear deformation perpendicular to the magnetic field increases for all spatial configurations of magnetic particles. The Young modulus for the tensile deformation along the magnetic field decreases for the chain-like configurations and increases for the plane-like configurations with increasing magnetic field.

This work was supported by funds of Europe Union and the Free State of Saxony.

[1] Varga, Z.; Filipcsei, G.; Zrínyi, M., Polymer 2005, 46, 7779-7787.

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