Investigation of PDMS-based magnetoelastomers via Rheometry
Sprache des Vortragstitels:
DPG Frühjahrstagung 2013
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Magnetoelastomers are hybrid materials based on elastomers and magnetic particles. Due to their magnetic features, their mechanical properties and shape can be controlled by external magnetic fields. Applications as mechanical actuators, mechanical dampers or for vibration reduction are conceivable.
Depending on the particle material, size and their distribution and arrangement inside the cured elastomeric matrix, the obtained mechanical properties (and possible applications) can be varied. Ultimately the movement of the particles is heavily dependent on the viscosity of the whole composite.
During this work, the preparation of the magnetoelastomeric material and corresponding rheological characterisation were carried out. The isotropic materials consisted of a crosslinkable polydimethylsiloxane (PDMS) matrix filled with different iron particles (distinguishable by aspect ratios and functionalities). The aim is to study the crosslinking behaviour and its dependence on the particle characteristics by means of time resolved rheological measurements.