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首页> 外文期刊>Polymers for advanced technologies >Preparation of piperazine cyanurate by hydrogen-bonding self-assembly reaction and its application in intumescent flame-retardant polypropylene composites
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Preparation of piperazine cyanurate by hydrogen-bonding self-assembly reaction and its application in intumescent flame-retardant polypropylene composites

机译：通过氢键自组装反应制备哌嗪氰脲酸盐及其在膨胀荧光阻燃聚丙烯复合材料中的应用

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摘要

Piperazine cyanurate (PCA) is designed and synthesized via hydrogen-bonding self-assembly reactions between piperazine and cyanuric acid. Chemical structure and morphology of PCA are investigated by Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The prepared PCA is combined with ammonium polyphosphate (APP) to prepare flame-retardant polypropylene (PP) composites. Thermostability, flammability, and combustion characteristics of PP composites are analyzed. The maximum thermal decomposition rate of flame-retarded PP composites has an apparent reduction compared with that of pure PP, and obvious char is left for this intumescent flame retardant (IFR) system of APP and PCA. A high limiting oxygen index value and UL-94 V-0 rating are achieved with addition of APP and PCA. In cone calorimetry test, heat and smoke releases of PP are significantly decreased by this IFR system. Gaseous decomposition products during the thermal decomposition of flame-retardant composites are studied. Chemical structure and morphology of char residues are analyzed. The results illustrate that APP and PCA have a superb synergistic action in the aspect of improvement in fire safety of PP. A possible flame-retardant mechanism is concluded to reveal the synergism between APP and PCA.
机译：通过哌嗪和氰尿酸之间的氢键自组装反应设计和合成哌嗪氰脲酸酯（PCA）。傅里叶变换红外光谱和扫描电子显微镜研究了PCA的化学结构和形态。制备的PCA与多磷酸铵（APP）组合以制备阻燃聚丙烯（PP）复合材料。分析了PP复合材料的热稳定性，易燃性和燃烧特性。与纯PP相比，火焰延迟PP复合材料的最大热分解速率具有明显的降低，并且对该APP和PCA的这种膨胀阻燃剂（IFR）系统留下明显的炭。通过添加APP和PCA，实现了高限制的氧指数值和UL-94 V-0等级。在锥形量热法测试中，通过该IFR系统的热量和烟雾释放显着降低。研究了在阻燃复合材料的热分解期间的气态分解产物。分析了Char残留物的化学结构和形态。结果说明了应用程序和PCA在PP的消防安全性的改进方面具有一流的协同作用。结论可能的阻燃机制以揭示应用程序和PCA之间的协同作用。

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