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首页> 外文期刊>Journal of Applied Polymer Science >Facile preparation and flame retardancy mechanism of cyclophosphazene derivatives for highly flame-retardant silicone rubber composites
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Facile preparation and flame retardancy mechanism of cyclophosphazene derivatives for highly flame-retardant silicone rubber composites

机译：用于高阻燃硅橡胶复合材料的环磷腈衍生物的容易制剂和阻燃机理

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摘要

A novel and efficient flame retardant cyclophosphazene derivative Hexa (p-acetamidophenoxy) cyclotriphosphazene (HACP) was successfully prepared via a facile one-step reaction. The chemical structure of HACP was characterized and confirmed by FT-IR, H-1 and C-13 NMR. Then the as-prepared HACP was incorporated into addition-cure liquid silicone rubber (ALSR) matrix to prepare highly flame-retardant rubber composites. It was found that the incorporation of HACP can significantly enhance the flame resistance of ALSR. Typically, the ALSR composites filled with 30 phr HACP achieved UL-94 V-0 rating and meanwhile the total heat release and total smoke release were decreased by 26.9% and 41.5%, respectively. Moreover, the flame-retardant mechanism of ALSR/HACP composites was investigated by TGA, Py-GCMS, FT-IR, SEM and EDX, confirming that HACP plays a significant role in capturing free-radicals and forming protective layers. This work designed a novel cyclophosphazene-based flame retardant to significantly enhance the flame retardancy of ALSR, which may offer some valuable inspiration for the fabrication of highly flame-retardant polymer composites.
机译：通过简单的一步反应成功制备了新型高效阻燃剂环磷腈衍生物六（对乙酰氨基苯氧基）环三磷腈（HACP）。通过FT-IR、H-1和C-13NMR对HACP的化学结构进行了表征和确认。然后将制备的HACP加入加成固化液体硅橡胶（ALSR）基体中，制备高阻燃橡胶复合材料。研究发现，HACP的加入可以显著提高ALSR的阻燃性。通常，填充30份HACP的ALSR复合材料达到UL-94 V-0等级，同时总热释放和总烟雾释放分别降低26.9%和41.5%。此外，通过TGA、Py-GCMS、FT-IR、SEM和EDX研究了ALSR/HACP复合材料的阻燃机理，证实了HACP在捕捉自由基和形成保护层方面发挥了重要作用。本研究设计了一种新型的环磷腈基阻燃剂，显著提高了ALSR的阻燃性能，为制备高阻燃聚合物复合材料提供了一些有价值的启示。

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