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Porous magnetic materials based on EPDM rubber filled with carbonyl iron particles

机译：基于填充有羰基铁颗粒的EPDM橡胶的多孔磁性材料

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This paper deals with a possibility to prepare porous magnetic elastomers whose mechanical behavior can be controlled by means of a magnetic field. The elastomers under investigation are based on ethylene propylene diene rubber (EPDM) filled with carbonyl iron particles. The foaming agent based on azodicarbonamide was used at 2 loading levels to control their porous character and the magneto-mechanical behavior was compared with non-porous magnetic EPDM system. The non-porous systems exhibited the highest magnetorheological efficiency even though the porous systems showed lower values of storage modulus in the inactive state. Porous systems also exhibited lower mechanical hysteresis when compared to non-porous one during single-strain measurements with increasing/decreasing magnetic field due to pores which increase a distance between particles and thus lower the strength of magnetic network created at high magnetic fields. Porous systems can be potentially utilized in applications in which conventional magnetorheological elastomers are too tough, thus, porous systems offer magnetorheological material with properties between magnetorheological fluids and solid elastomers.
机译：本文涉及制备多孔磁性弹性体的可能性，该弹性磁性体的机械性能可以通过磁场来控制。研究中的弹性体基于填充有羰基铁颗粒的乙丙二烯橡胶（EPDM）。以2种负载量使用基于偶氮二甲酰胺的发泡剂来控制其多孔特性，并将磁机械性能与无孔磁性EPDM系统进行了比较。即使多孔系统在非活性状态下显示较低的储能模量，非多孔系统也表现出最高的磁流变效率。与单孔测量期间的非多孔系统相比，多孔系统还表现出较低的机械滞后性，由于孔的增加/减小，磁场增加/减小，从而增加了粒子之间的距离，从而降低了在高磁场下产生的磁网络的强度。多孔系统可潜在地用于常规磁流变弹性体太坚韧的应用中，因此，多孔系统提供的磁流变材料具有在磁流变流体和固体弹性体之间的性能。

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