New Composite Elastomers with Giant Magnetic Response

作者：Chertovich A V; Stepanov G V; Kramarenko E Yu^*; Khokhlov A R

来源：Macromolecular Materials and Engineering, 2010, 295(4): 336-341.

DOI：10.1002/mame.200900301

• composites
• elastomers
• modulus
• stimuli-sensitive
• polymers
• viscoelastic properties

Novel magnetorheological elastomers (MRE) based on a highly elastic silicone rubber filled with carbonyl iron magnetic particles of 3-5 and 3-50 mu m are synthesized. The effect of an external homogeneous magnetic field on the viscoelastic properties of these materials is studied by dynamic experiments (shear oscillations on a rheometer). It is shown that the magnetic response of the MRE increases with a decrease of the strain. At 1% deformation both the storage and loss moduli of the new MRE demonstrate a giant response to the magnetic field, namely, an increase of more than two orders of magnitude in both moduli in a field of 300 mT is observed. In addition, these new MREs show a twofold increase of the damping ratio, which is important for their application as tunable vibration absorbers.

• 出版日期2010-4-14