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首页> 外文期刊>RSC Advances >Enhanced flame-retardant effect of a montmorillonite/phosphaphenanthrene compound in an epoxy thermoset
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Enhanced flame-retardant effect of a montmorillonite/phosphaphenanthrene compound in an epoxy thermoset

机译：环氧树脂热固性蒙脱土/磷菲化合物的阻燃效果增强

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摘要

A phosphaphenanthrene and triazinetrione group containing flame retardant (TAD) is combined with organically modified montmorillonite (OMMT) in epoxy resin thermosets (EP) to improve the performance of the flame-retardant system. When only 1 wt% OMMT/4 wt% TAD is introduced into the EP, the limited oxygen index (LOI) rises from 26% to 36.9% and a V-0 rating is achieved in a UL 94 test. The decomposition and pyrolysis products in the gas phase and condensed phase were characterized using thermogravimetry-Fourier transform infrared spectroscopy (TG-FTIR). The influence on the decomposition of EP, such as the increase in char yield, is limited with the incorporation of OMMT; a large amount of the phosphorus is released into the gas phase. The flame-retardant effect evaluation based on cone calorimeter data testified that OMMT improves the protective-barrier effect of the fire residue of OMMT/TAD/EP on the macroscopic scale, while TAD mainly causes flame inhibition. The fire residues showed a corresponding macroscopic appearance (digital photo) and microstructure (scanning electron microscope [SEM] results). The protective barrier effect of OMMT and the flame-inhibition effect of TAD combined to exert a superior flame-retardant effect, resulting in sufficient flame-retardant performance of OMMT/TAD/EP.
机译：在环氧树脂热固性塑料（EP）中，将含磷菲基和三嗪三酮基的阻燃剂（TAD）与有机改性的蒙脱土（OMMT）结合使用，以改善阻燃体系的性能。当仅将1 wt％OMMT / 4 wt％TAD引入EP时，极限氧指数（LOI）从26％上升至36.9％，并且在UL 94测试中达到V-0等级。使用热重-傅里叶变换红外光谱仪（TG-FTIR）表征气相和冷凝相中的分解和热解产物。 OMMT的加入限制了对EP分解的影响，例如焦炭收率的提高。大量的磷释放到气相中。基于锥形量热仪数据的阻燃效果评估证明，OMMT在宏观上改善了OMMT / TAD / EP的火渣的防护屏障作用，而TAD主要引起阻燃。火渣显示出相应的宏观外观（数码照片）和微观结构（扫描电子显微镜[SEM]结果）。 OMMT的保护性屏障作用与TAD的阻燃作用相结合，发挥出优异的阻燃效果，从而使OMMT / TAD / EP具有足够的阻燃性能。

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