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Synthesis of a novel modified chitosan as an intumescent flame retardant for epoxy resin

机译:一种新型改性壳聚糖作为环氧树脂膨胀阻燃剂的合成

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According to the concept of fire life cycle assessment (LCA), a new type of intumescent flame retardant was designed and synthesized by chemically bonding chitosan, phosphorus pentoxide and melamine. The resultant compound, chitosan ethoxyl melamine phosphate (CEMP), was characterized by FTIR, 1H NMR, 31P NMR, XRD and SEM. The performance of CEMP and organic montmorillonite (OMMT) was evaluated in the substrate of epoxy resin (EP) with limited oxygen index (LOI), UL-94, cone calorimetric test (CCT), TGA and TG-IR. As a result, intumescent flame retardant EP (EP3) containing 30.6% LOI and V-0 rating was prepared by adding 3?wt% OMMT and 15?wt% CEMP. The CCT results indicated that CEMP and OMMT reduced the peak of heat release rate (PHRR) to about one fourth that of pure EP and total heat release (THR), 1/2. Decomposition of EP and EP3 was traced from 100 to 600°C by TG-IR.
机译:根据火命循环评估(LCA)的概念,通过化学键合壳聚糖,五氧化磷和三聚氰胺设计和合成了一种新型的膨胀型阻燃剂。所得化合物,壳聚糖乙氧基三聚氰胺磷酸盐(CEMP),其特征在于FTIR,1H NMR,31P NMR,XRD和SEM。在具有有限的氧指数(LOI),UL-94,锥形量热试验(CCT),TGA和TG-IR的环氧树脂(EP)的基材中评价CEMP和有机蒙脱石(EMOT)的性能。结果,通过加入3→wt%OMMT和15℃,制备含有30.6%LOI和V-0等级的膨胀阻燃EP(EP3)。 CCT结果表明,CEMP和OMMT将热释放率(PHRR)的峰降低至纯EP和总热释放(Thr),1/2的达到大约四分之一。 EP和EP3的分解通过TG-IR跟踪100至600℃。

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