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首页> 外文期刊>Journal of thermal analysis and calorimetry >Influence of Fe2O3 on smoke suppression and thermal degradation properties in intumescent flame-retardant silicone rubber
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Influence of Fe2O3 on smoke suppression and thermal degradation properties in intumescent flame-retardant silicone rubber

机译:Fe2O3对膨胀型阻燃硅橡胶的抑烟和热降解性能的影响

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摘要

This article examines the feasibility of intumescent flame retardant (based on phosphorus acid, melamine, and pentaerythritol) as a flame retardant and Fe2O3 as a smoke suppression agent in silicone rubber (SR) composites. Smoke suppression of Fe2O3 on intumescent flame-retardant SR composites was investigated using smoke density test and cone calorimeter test (CCT). And, the flammability of SR composites was characterized using CCT at an incident heat flux of 50 kW m(-2). The test results further revealed that Fe2O3 could increase smoke suppression efficiency and thermal degradation temperature. Fe2O3 can promote early cross-linking of polymer during decomposition to increase char formation. The silica ash layer integrity governs the efficiency of diffusion barrier that restricts the diffusion of fuels into combustion zone and access of oxygen to the unburned fuels.
机译:本文探讨了在硅橡胶(SR)复合材料中,膨胀型阻燃剂(基于磷酸,三聚氰胺和季戊四醇的阻燃剂)和Fe2O3作为抑烟剂的可行性。利用烟密度测试和锥形量热测试(CCT)研究了膨胀型SR SR复合材料中Fe2O3的抑烟性。并且,SR C复合材料的可燃性使用CCT在入射热通量为50 kW m(-2)时进行了表征。测试结果进一步表明,Fe2O3可以提高抑烟效率和热降解温度。 Fe 2 O 3可以促进分解过程中聚合物的早期交联,从而增加炭的形成。硅灰层的完整性决定了扩散壁垒的效率,该扩散壁垒限制了燃料向燃烧区的扩散以及氧气对未燃烧燃料的进入。

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