首页> 外文期刊>Journal of Macromolecular Science. Physics >Organic Nano-Montmorillonite for Simultaneously Improving the Flame Retardancy, Thermal Stability, and Mechanical Properties of Intumescent Flame-Retardant Silicone Rubber Composites
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Organic Nano-Montmorillonite for Simultaneously Improving the Flame Retardancy, Thermal Stability, and Mechanical Properties of Intumescent Flame-Retardant Silicone Rubber Composites

机译:同时改善膨胀型阻燃硅橡胶复合材料的阻燃性,热稳定性和机械性能的有机纳米蒙脱土

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摘要

The flammability of room temperature vulcanized silicone rubber (RTVSR) composites filled with melamine phosphate (MP) as intumescent flame-retardant additives was characterized by limiting oxygen index (LOI), UL-94 test, and cone calorimeter. In addition, the thermal degradation of the composites was studied using thermogravimetric analysis (TGA). Furthermore, in order to relate to actual application requirements, the comprehensive performance of the RTVSR/MP composites was optimized by adding organic nano-montmorillonite (OMMT) as a partial substitute for the MP. The as-prepared intumescent flame-retardant RTVSR/MP/OMMT nanocomposites were characterized by LOI, UL-94 test, TGA, cone calorimetry, scanning electron microscopy (SEM), and mechanical tests. The residue morphology formed after the burning of the nanocomposites was analyzed by its SEM and digital photographs. The results showed that the flame-retardant nanocomposites filled with 10 phr OMMT and 35 phr MP displayed the best comprehensive performance in terms of the flame retardancy, mechanical properties, and heat stability at low cost. It is expected that the intumescent flame-retardant silicone rubber composites with simultaneously improved flame retardancy, thermal stability, and mechanical properties will meet more requirements of the increasingly complex applications.
机译:通过限制氧指数(LOI),UL-94测试和锥形量热仪,表征了填充有三聚氰胺磷酸盐(MP)作为膨胀型阻燃添加剂的室温硫化硅橡胶(RTVSR)复合材料的可燃性。此外,使用热重分析(TGA)研究了复合材料的热降解。此外,为了满足实际应用需求,通过添加有机纳米蒙脱土(OMMT)作为MP的部分替代品,优化了RTVSR / MP复合材料的综合性能。通过LOI,UL-94测试,TGA,锥形量热,扫描电子显微镜(SEM)和机械测试对制备的膨胀型RTVSR / MP / OMMT纳米复合材料进行了表征。纳米复合材料燃烧后形成的残留物形态通过其SEM和数字照片进行了分析。结果表明,在低成本,阻燃性,机械性能和热稳定性方面,填充有10 phr OMMT和35 phr MP的阻燃纳米复合材料表现出最好的综合性能。预期同时具有改善的阻燃性,热稳定性和机械性能的膨胀型阻燃硅橡胶复合材料将满足日益复杂的应用的更多要求。

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