This article presents the development of a new kind of magnetorheological elastomer blend made with natural rubber, acrylonitrile–butadiene rubber (NR-NBR), and electrolytic iron particles through solution mixing. The compressive stress and elastic modulus of the composites in the isotropic and anisotropic states of the filler were studied. A unique study of the filler distribution and filler orientation mechanism was proposed from the compressive properties and scanning electron microscopy. A strong improvement in the elastic modulus of the NR–NBR blend from isotropic to anisotropic change was achieved as compared with NR and NBR in single-rubber composites. The filler content in the anisotropic magnetorheological elastomers was optimized by measuring the field-dependent elastic modulus in the presence of an externally applied magnetic field. The blend rubber composites showed better sensitivity in the presence of a magnetic field than the NR and NBR composites did. The improvement might be due to the better filler orientation and strong adhesion of filler particles by the NR phase in the blend matrix. The new elastomer blends may have applications in active dampers, vibrational absorption, and automotive bushings.

本文介绍了一种由天然橡胶、丙烯腈-丁二烯橡胶 (NR-NBR) 和电解铁颗粒通过溶液混合制成的新型磁流变弹性体共混物的开发。研究了填料在各向同性和各向异性状态下复合材料的压缩应力和弹性模量。从压缩性能和扫描电子显微镜下提出了对填料分布和填料取向机制的独特研究。与单橡胶复合材料中的 NR 和 NBR 相比，NR-NBR 共混物的弹性模量从各向同性到各向异性变化有了很大的提高。通过在存在外加磁场的情况下测量场相关的弹性模量来优化各向异性磁流变弹性体中的填料含量。共混橡胶复合材料在磁场存在下表现出比 NR 和 NBR 复合材料更好的灵敏度。这种改进可能是由于更好的填料取向和填料颗粒在共混基质中的 NR 相的强粘附性。新的弹性体混合物可能在主动阻尼器、振动吸收和汽车衬套中得到应用。