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Material Behaviour New magnetorheological elastomers based on polyurethane/Si-rubber hybrid
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In this paper, a magnetorheological elastomer based on polyurethane (PU)/silicone rubber (Si-rubber) hybrid was fabricated without applying a magnetic field.Abstract:
A type of magnetorheological elastomer based on polyurethane (PU)/silicone rubber (Si-rubber) hybrid was fabricated without applying a magnetic field. The MR effect was improved by optimizing preparation conditions, in particular by adjusting the PU/Si-rubber ratio, and improving compatibility between PU and Si-rubber. The influences of the preparation conditions and the relationship between the microstructure and MR effect of this kind of magnetorheological elastomer are discussed in detail. The results show that this kind of MR elastomer has better MR effect than that of MR elastomers based on pure Si-rubber or PU matrix with the same testing conditions. SEM analysis indicates that the former forms a peculiar interpenetrating microstructure in the presence of PU in the matrix. The maximum increase in shear modulus of this kind of MR elastomer can be up to 0.5 MPa when exposed to a magnetic field of about 0.2 T. q 2004 Elsevier Ltd. All rights reserved.read more
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References
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The Magnetoviscoelastic Response of Elastomer Composites Consisting of Ferrous Particles Embedded in a Polymer Matrix
TL;DR: In this paper, a quasi-static dipole model is presented to examine the magnetoviscoelastic effect of these elastomer composites and the model is semi-empirical in that it may be fit to experimental data over a broad range of applied magnetic fields.
Proceedings ArticleDOI
Magnetorheological elastomers : Properties and applications
TL;DR: In this paper, a family of magnetorhelogical elastomers, comprising micrometer-sized carbonyl iron particles embedded in natural rubber, was developed for the construction of controllable elastomeric components.
Journal ArticleDOI
Performance of isotropic magnetorheological rubber materials
Mattias Lokander,Bengt Stenberg +1 more
TL;DR: In this article, it was shown that MR rubber materials with large irregular particles have a large MR effect although the particles are not aligned within the material, which is explained by the low critical particle volume concentration of such particles.
Journal ArticleDOI
Experimental Research and Modeling of Magnetorheological Elastomers
TL;DR: In this article, two different magnetorheological elastomers, one made of polyurethane and the other made of natural rubber, are successfully fabricated, and the experimental results show that the modulus of the rubber elastomer can increase by 28% under a strong magnetic field.
Journal ArticleDOI
Improving the magnetorheological effect in isotropic magnetorheological rubber materials
Mattias Lokander,Bengt Stenberg +1 more
TL;DR: In this article, it was shown that the absolute MR effect of isotropic MR rubber materials with large irregular iron particles is independent of the matrix material, and that the relative MR effect can be increased by the addition of plasticisers.