SEBS基热塑性磁流变弹性体复合材料的制备、结构与性能

Preparation, structure and properties of SEBS based thermoplastic magnetorheological elastomer composites

选用氢化苯乙烯弹性体聚(苯乙烯-b-乙烯-b-丁烯-b-苯乙烯)(SEBS)为基体、软磁性羰基铁粉(CI)为磁性填料,采用熔融共混技术制备新型各向同性和各向异性SEBS基热塑性磁流变弹性体(MRE)复合材料。详细研究了羰基铁含量和外加磁场等因素对SEBS基热塑性MRE复合材料的微观结构、热性能、机械性能和磁流变效应的影响。结果表明,随羰基铁粉含量的增加和外加磁场强度的增强,SEBS基热塑性MRE复合材料的磁性颗粒结构有序度、热稳定性、机械性能和磁流变效应均获得显著提高,各向异性MRE复合材料的储能模量和磁流变效应明显优于各向同性MRE复合材料。

Novel isotropic and anisotropic SEBS based thermoplastic magnetorheological elastomer （MRE） composites were prepared by melting blending technique with the poly （styrene-b-ethylene-b-butylene-b-styrene） （SEBS） as matrix and carbonyl iron （CI） powders as magnetic fillers, and the effects of carbonyl iron concentration and external magnetic field on their microstructure, thermal property, mechanical property and magnetorheological effect were investigated in detail. The experimental results reveal that with the increase of carbonyl iron content and enhancement of external magnetic field, the ordered degree of magnetic particles structure, thermal stability, mechanical property and magnetorheological effect of the SEBS based thermoplastic MRE composites were remarkably improved, and the storage modulus and magnetorheological effect of the anisotropic MRE composites are obviously superior to those of the isotropic MRE composites.