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首页> 外文期刊>Polymer bulletin >Effect of hollow glass microsphere on the flame retardancy and combustion behavior of intumescent flame retardant polypropylene composites
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Effect of hollow glass microsphere on the flame retardancy and combustion behavior of intumescent flame retardant polypropylene composites

机译：中空玻璃微球对膨胀阻燃聚丙烯复合材料阻燃性和燃烧行为的影响

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摘要

Nowadays, increasing the fire safety of polypropylene (PP) is an important research direction. In this article, the investigation mainly focuses on the effect of hollow glass microsphere (HGM) on improving the fire safety of PP/intumescent flame retardants (IFR) composites. The flame retardancy, smoke suppression and thermal stability of PP/IFR/HGM system were studied by limiting oxygen index (LOI), vertical burning (UL-94), cone calorimeter tests (CCT) and thermogravimetric analysis. All the results demonstrated that the incorporation of HGM into PP/IFR system can clearly improve the fire safety of PP/IFR materials. The result of the LOI can be as high as 36.5% with only 1 wt% HGM and 24 wt% IFR addition. Scanning electron microscope-energy-dispersive spectrometer (SEM-EDS) and CCT results illustrated that during the combustion, HGM would migrate onto the surface of the sample to form a compact char layer and prevent further combustion of the material. Furthermore, the CCT results indicated that HGM can slow down the peak heat release rate (from 94.9 to 61.6 kW/m(2)) and make the total smoke release (TSR) decrease from 1210 m(2)/m(2)(PP/IFR) to 544 m(2)/m(2)(PP/IFR/HGM), reduced by 55.0%. In addition, HGM can improve the thermal stability of PP/IFR systems.
机译：如今，增加了聚丙烯的防火安全（PP）是重要的研究方向。在本文中，调查主要侧重于中空玻璃微球（HGM）对改善PP /膨胀阻燃剂（IFR）复合材料的火灾安全性的影响。通过限制氧指数（LOI），垂直燃烧（UL-94），锥形量热检测（CCT）和热重分析来研究PP / IFR / HGM系统的阻燃性，烟雾抑制和热稳定性。所有结果表明，HGM掺入PP / IFR系统可以明确提高PP / IFR材料的火灾安全性。 LOI的结果可以高达36.5％，只有1wt％HGM和24wt％IFR添加。扫描电子显微镜 - 能量分散仪（SEM-EDS）和CCT结果示出了在燃烧过程中，HGM将迁移到样品的表面上以形成紧凑的炭层并防止材料的进一步燃烧。此外，CCT结果表明HGM可以减缓峰值热释放速率（从94.9至61.6 kW / m（2）），并使总烟雾释放（TSR）降低1210 m（2）/ m（2）（ PP / IFR）至544米（2）/ m（2）（PP / IFR / HGM），减少55.0％。此外，HGM可以提高PP / IFR系统的热稳定性。

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