Flame-retarded sorbitol-based bioepoxy resins cured with cycloaliphatic amine hardener and containing different commercially available additive-type flame retardants (FRs) have been prepared. Three different oxidation states of phosphorus, aluminium diethyl phosphinate (AlPi) (+1), phosphonate polyol (+3), ethyl ethylene glycol phosphate and ammonium polyphosphate (APP) (+5), have been studied. The effect of using melamine cyanurate with APP and AlPi has been assessed. The self-extinguishing V-0 rating according to UL-94 flammability standard tests and very good limiting oxygen index for combustion are displayed for most flame-retarded samples at 3 wt% phosphorus content. The flame retardancy effect for the additives was confirmed using cone calorimetry. The samples containing MC with APP at 3%P content showed a dramatic reduction of the total heat release by 60% and reduction of the peak of heat release rate by 70% compared to the reference epoxy matrix. The addition of these FRs together did not decrease the glass transition temperature significantly.

中文翻译：

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通过磷系阻燃剂提高山梨醇基生物环氧树脂体系的热和阻燃性能

已经制备了用脂环族胺硬化剂固化并含有不同的市售添加剂型阻燃剂（FRs）的阻燃山梨醇基生物环氧树脂。已经研究了磷的三种不同氧化态：二乙基亚膦酸铝 (AlPi) (+1)、膦酸多元醇 (+3)、乙二醇磷酸乙酯和多磷酸铵 (APP) (+5)。已经评估了将三聚氰胺氰尿酸酯与 APP 和 AlPi 一起使用的效果。根据 UL-94 可燃性标准测试，大多数阻燃样品在 3 wt% 的磷含量下显示出自熄 V-0 等级和非常好的燃烧极限氧指数。使用锥形量热法证实了添加剂的阻燃效果。与参考环氧树脂基体相比，含有 3% P 含量 APP 的 MC 的样品显示总热量释放量显着降低 60%，热量释放率峰值降低 70%。将这些 FR 一起添加并没有显着降低玻璃化转变温度。