Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Focus: Field Controllable Functional Polymers II

CPP 13.4: Vortrag

Montag, 16. März 2015, 15:45–16:00, C 264

Magneto-Sensitive Elastomers — •Sahbi Aloui and Manfred Klüppel — German Institute of Rubber Technology, Hannover, FRG

Magneto-sensitive elastomers (MSE) consist of a non-magnetic polymer matrix in which magnetic filler particles are embedded. These adjustable materials are able to ensure adaptability to changing environmental conditions by varying in-operando their dynamical properties. MSE have proven themselves in several practical applications like adaptive vibration control systems, a recently patented sensor for temperature measurements and industrial adhesives.

We study the non-linear dynamical-mechanical behavior and the magnetorheological response of MSE. Considerable influences on the properties of the MSE exert the magnetic fillers. Basic parameters like filler volume fraction in the prepared MSE, chemical composition and size distribution of magnetic particles play a major role. We focus on an optimization of mechanical and magnetic properties of MSE by preparing an anisotropic MSE, whose stiffness and hysteresis behaviors show magnetic orientation dependence. Combining highly reinforcing magnetic nanoparticles with micro-sized particles is advantageous to obtain a MSE with high switch ability in a magnetic field and reasonable mechanical properties.

References Aloui S., Klüppel M. *Magneto-Rheological Response of Elastomer Composites with Hybrid-Magnetic Fillers*, Smart Materials and Structures (submitted) Karl C., McIntyre J., Alshuth T., Klüppel M., Kautsch. Gummi Kunstst. 66/1-2 (2013), 46-53