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首页> 外文期刊>Journal of Applied Polymer Science >Study on char reinforcing of different inorganic fillers for expandable fire resistance silicone rubber
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Study on char reinforcing of different inorganic fillers for expandable fire resistance silicone rubber

机译：不同无机填料的耐膨松耐火性硅橡胶炭的研究

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摘要

Sodium silicate monohydrate (NSH), glass frits (GF) and aluminum hydroxide (ATH) were incorporated into room temperature vulcanized (RTV) silicone rubber (SR) as char reinforcing materials to improve the fire resistance of intumescent flame retardant silicone rubber. SR composites containing only intumescent flame retardant such as phosphorus nitrogen composite flame retardant (NH2-C) and expandable graphite (EG) were used as comparison samples. Limiting oxygen index (LOI) test, vertical burning test (UL-94), flame resistance test, scanning electron microscopy (SEM) and X-ray diffraction spectroscopy tests, as well as volume variation and compression strength of char residues were used to discuss the effects of the above-mentioned fillers on the fire resistance, char residue strength and char integrity of SR composites. The results showed that SR composite filled with only intumescent flame retardants EG and NH2-C had excellent flame retardancy. After adding ATH, the char residue was relatively dense and had good compressive strength, but its thermal insulation performance was reduced. GF or NSH reduced the flame retardancy of SR composites, but it obviously played a role in binding combustion residues, forming new crystals and improving the stability of char residues.
机译：将一水硅酸钠（NSH）、玻璃料（GF）和氢氧化铝（ATH）作为炭增强材料加入室温硫化硅橡胶（SR）中，以提高膨胀型阻燃硅橡胶的耐火性能。使用仅含有膨胀型阻燃剂的SR复合材料，如磷-氮复合阻燃剂（NH2-C）和可膨胀石墨（EG）作为对比样品。通过极限氧指数（LOI）试验、垂直燃烧试验（UL-94）、阻燃性试验、扫描电镜（SEM）和X射线衍射光谱试验，以及残炭的体积变化和抗压强度，讨论了上述填料对SR复合材料耐火性、残炭强度和残炭完整性的影响。结果表明，仅填充膨胀型阻燃剂EG和NH2-C的SR复合材料具有优异的阻燃性能。加入ATH后，炭渣相对致密，抗压强度较好，但隔热性能降低。GF或NSH降低了SR复合材料的阻燃性，但对结合燃烧残渣、形成新的晶体和提高残炭的稳定性起到了明显的作用。

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