Abstract A halogen-free, organic boron/nitrogen compound, 2,4,6-tris-(4-boronphenoxy)-(1,3,5)-triazine (TNB), was synthesized. The thermal and flame-retardant properties of epoxy resins (EP) containing TNB were investigated based on TGA, limiting oxygen index (LOI), vertical burning (UL 94) and cone calorimeter tests. The results showed that the residual char of EP increased after TNB was present. The LOI value of EP/20%TNB reached 31.2% and UL 94 V-0 rating was achieved. The peak heat release rate and total heat release of EP/20%TNB reduced to 305.3 kW/m2 and 58.0 MJ/m2, respectively. In addition, the flame-retarding mechanism was investigated using X-ray diffraction, scanning electron microscopy, laser Raman spectroscopy, elemental analysis, and thermogravimetric analysis-infrared spectroscopy. The results show that TNB is an efficient flame retardant, which is effective in the gas and condensed phases simultaneously.

中文翻译：

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含硼三嗪衍生物作为环氧树脂阻燃剂的合成及应用

摘要 合成了一种无卤有机硼氮化合物2,4,6-三-(4-硼苯氧基)-(1,3,5)-三嗪(TNB)。基于 TGA、极限氧指数 (LOI)、垂直燃烧 (UL 94) 和锥形量热仪测试，研究了含有 TNB 的环氧树脂 (EP) 的热和阻燃性能。结果表明，存在TNB后EP的残留炭增加。EP/20%TNB 的 LOI 值达到 31.2%，达到 UL 94 V-0 等级。EP/20%TNB 的峰值放热率和总放热分别降至 305.3 kW/m2 和 58.0 MJ/m2。此外，还使用 ​​X 射线衍射、扫描电子显微镜、激光拉曼光谱、元素分析和热重分析-红外光谱研究了阻燃机制。