Abstract
Due to their magnetic field dependent mechanical response, polymeric materials filled with magnetic particles have become of major practical and theoretical interest. the dynamic-mechanical behavior of polydimethylsiloxane rubber filled with ferro-oxide with and without magnetic field has been investigated in this study. Specimens with different hardness and with two distinct orientations of the fillers (isotropy, anisotropy) were prepared. Dynamic mechanical analysis experiments were performed to determine the storage and loss modulus over a wide amplitude and frequency range with and without external magnetic field. In order to characterize the influence of the ferro-oxide filler particles, a permanent magnetic field to the specimen grips has been attached. The complex-, storage- and loss modulus and the loss factor values were determined. Finally, to compare the isotropic and anisotropic materials a magnetic stiffening factor (MSF) was defined and applied.
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