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首页> 外文期刊>Polymers for advanced technologies >Synergistic fire safety improvement between oyster shell powder and ammonium polyphosphate in TPUTPU composites
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Synergistic fire safety improvement between oyster shell powder and ammonium polyphosphate in TPUTPU composites

机译：牡蛎壳粉与多磷酸铵之间的协同消防安全改进 TPU TPU 复合材料

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> In this article, oyster shell powder (OSP) was used as fire safety agent with ammonium polyphosphate (APP) in thermoplastic polyurethane (TPU) composites. The synergistic fire safety improvement between OSP and APP was intensively investigated using limiting oxygen index (LOI), UL‐94, smoke density test (SDT), and cone calorimeter test (CCT). There is a good synergistic effect of reducing the fire hazards when OSP was used with APP in TPU. The peak heat release rate (pHRR) of the sample with 2.0‐wt% OSP and 8.0‐wt% APP decreased to 86.8?kW/m 2 from 175.7?kW/m 2 of the sample with only 10.0‐wt% APP. The SDT results showed that the luminous flux of sample OSP2/APP8 was up to 28.9% at the end of experiment with flame, which was much higher than that of pure TPU (1.5%). The thermal stability and thermal decomposition of TPU composites were characterized by thermogravimetric analysis/Fourier infrared spectrum analysis (TG‐IR). The result revealed the inert gasses (including CO 2 and water vapor) produced by the reaction between OSP and APP. A char formed on the surface of composites, hindered the flame spread, reduced the release of combustible gas, and restricted the precursor of smoke into combustion zone.
机译： > 在本文中，牡蛎壳粉末（OSP）用作热塑性聚氨酯（TPU）复合材料中的多磷酸铵（APP）作为防火安全剂。使用限制氧指数（LOI），UL-94，烟雾密度试验（SDT）和锥形量热计测试（CCT），对OSP和APP之间的协同消防安全改进进行了集中调查。当OSP在TPU中使用APP时，减少火灾危险的良好协同效应。样品的峰值热释放速率（PHRR）具有2.0-Wt％OSP和8.0wt％应用的样品降低至86.8 kW / m 2 从175.7？kw / m 2 仅具有10.0wt％应用程序的样本。 SDT结果表明，样品的光通量在试验结束时均高达28.9％，火焰高于纯TPU（1.5％）。 TPU复合材料的热稳定性和热分解是通过热重分析/傅里叶红外光谱分析（TG-IR）的特征。结果揭示了惰性气体（包括CO 2 通过OSP和APP之间的反应产生的水蒸气。在复合材料表面上形成的炭，阻碍了火焰涂抹，减少了可燃气体的释放，并将烟雾前体限制为燃烧区。

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