Abstract Epoxy resin (EP) suffers from inherent flammability, many efforts had been made to address this issue. In this work, melamine hydroxy ethylidene diphosphonate wrapped montmorillonite (Mt@MHEDP) was successfully prepared through in situ fabrication to endow EP with lower fire hazards. The prepared Mt@MHEDP was well characterized by XRD, FTIR and SEM-EDS, a series of EP/Mt@MHEDP composites were prepared. The fire performance and thermal stability of EP composites were evaluated by LOI, cone calorimeter test and TGA. The flame-retardant mechanism was investigated by SEM and TG-IR. Due to the presence of MHEDP particles on Mt, the prepared Mt@MHEDP was dispersed uniformly in the EP matrix. From cone test, peak heat release rate (p-HRR) and flame growth index (FGI) of EP composites were reduced by 31.7% and 38.6%, respectively, with the addition of 8 wt% Mt@MHEDP. Moreover, the peak smoke production rate (p-SPR) and peak CO production rate were decreased by 30.9% and 40.4%, respectively. From TG-IR, the release of toxic CO and organic volatiles during the decomposition was decreased significantly, implying the lower toxicity and higher fire safety. The enhanced flame retardancy, suppressed smoke production and lower toxicity can be attributed to the synergetic effect of Mt and MHEDP.

中文翻译：

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原位制备三聚氰胺羟基亚乙基二膦酸酯包裹蒙脱石降低环氧树脂火灾隐患

摘要 环氧树脂 (EP) 具有固有的可燃性，已做出许多努力来解决这个问题。在这项工作中，通过原位制备成功地制备了三聚氰胺羟基亚乙基二膦酸酯包裹的蒙脱石（Mt@MHEDP），使EP具有较低的火灾危险。通过XRD、FTIR和SEM-EDS对制备的Mt@MHEDP进行了表征，制备了一系列EP/Mt@MHEDP复合材料。EP复合材料的防火性能和热稳定性通过LOI、锥形量热仪测试和TGA进行评估。通过SEM和TG-IR研究了阻燃机理。由于 MHEDP 颗粒在 Mt 上的存在，制备的 Mt@MHEDP 均匀地分散在 EP 基质中。从锥体试验来看，EP复合材料的峰值放热率（p-HRR）和火焰生长指数（FGI）分别降低了31.7%和38.6%，添加 8 wt% Mt@MHEDP。此外，峰值烟雾产生率（p-SPR）和峰值 CO 产生率分别降低了 30.9% 和 40.4%。从 TG-IR 来看，分解过程中有毒 CO 和有机挥发物的释放显着减少，意味着较低的毒性和较高的防火安全性。增强的阻燃性、抑制烟雾的产生和较低的毒性可归因于 Mt 和 MHEDP 的协同作用。