我们研究了碳化硅(SiC)和SiC混合系统与不同常规填料(二氧化硅,炭黑,石墨烯,石墨烯水滑石,埃洛石)在流变测量中,交联密度,机械性能,老化稳定性,形态学,热行为,乙烯-丙烯-二烯(EPDM)橡胶复合材料的可燃性。混合填料体系对EPDM复合材料的性能显示出技术上有希望的协同作用。注意到填充有混合SiC填料体系的EPDM复合材料具有明显的增强作用。拉伸强度增加在系统与炭黑,二氧化硅,和石墨烯纳米片,21%,37%,68%,分别,与整洁的EPDM相比。动态力学分析(DMA)显示,在掺入混合SiC填料后,EPDM复合材料的玻璃化转变温度(Tg)向更高的值移动。表明大分子链的流动性受到填料颗粒的限制。重要的是,SiC作为填料在EPDM橡胶复合材料中的应用导致了可燃性的显著降低,如微型燃烧量热法(MCC)所示。HAL/SiC和LDH/SiC混合系统获得了最有希望的结果,最终得到的复合材料具有较高的阻燃性和良好的力学性能。该研究强调了SiC和SiC杂化体系作为有效填料改善弹性体复合材料性能的巨大潜力。
We studied the effects of silicon carbide (SiC) and SiC hybrid systems with different conventional fillers (silica, carbon black, graphene, hydrotalcite, halloysite) on the rheometric measurements, crosslink density, mechanical performance, aging stability, morphology, thermal behaviour, and flammability of ethylene-propylene-diene (EPDM) rubber composites. The hybrid filler systems showed technically promising synergetic effects on the performance of the EPDM composites. A pronounced reinforcing effect in EPDM composites filled with hybrid SiC filler systems was noted. Tensile strength increased in the systems with carbon black, silica, and graphene nanoplatelets, by 21%, 37%, and 68%, respectively, compared to the neat EPDM. Dynamic-mechanical analysis (DMA) revealed a shift of the glass transition temperature (Tg) of EPDM composites towards higher values following the incorporation of hybrid SiC fillers, indicating that the mobility of the macromolecule chains was restricted by the presence of filler particles. Importantly, the application of SiC as a filler in EPDM rubber composites contributed to a considerable reduction in flammability, as demonstrated by microscale combustion calorimetry (MCC). The most promising results were obtained for HAL/SiC and LDH/SiC hybrid systems, which produced final composites with high flame retardancy and good mechanical performance. The study highlights the significant potential of SiC and SiC hybrid systems as effective fillers improving the properties of elastomer composites.