植酸三聚氰胺盐阻燃环氧树脂研究

Study on flame retardant epoxy resin with phytic acid-melamine salt

利用生物基阻燃剂植酸三聚氰胺盐(MPA)阻燃改性环氧树脂并对其性能进行研究。通过红外光谱(FTIR)以及X射线光电子能谱(XPS)对MPA化学结构进行表征。利用热重分析仪(TGA)、极限氧指数测试仪(LOI)、垂直燃烧测试仪(UL-94)及锥形量热测试仪(CC)研究阻燃环氧树脂的热稳定性及阻燃性能。热重分析结果表明,MPA阻燃剂在800℃残炭达到25.6%,引入环氧树脂后可提升材料高温区热稳定性。垂直燃烧测试显示MPA在15%添加量下可赋予环氧树脂UL-94 V-0等级,表明MPA对环氧树脂有较好的阻燃效果。进一步锥形量热结果表明,MPA的加入显著降低了环氧树脂的热释放速率及总热释放,同时表现出优异的抑烟性能。

The bio-based flame retardants phytic acid-melamine salt(MPA) was used to improve the flame retardant properties of modified epoxy resin(EP) and its performance was studied. Infrared spectroscopy(FTIR) and X-ray photoelectron spectroscopy(XPS) were used to characterize the chemical structure of MPA.Thermogravimetric analyzer(TGA), limiting oxygen index tester(LOI), vertical combustion tester(UL-94) and cone calorimeter(CC) were used to study the thermal stability and flame retardancy for EP. TGA results showed that the residue char for MPA is 25.6% at 800 ℃, which enhanced thermal stability of EP in high temperature zone. EP with 15% MPA can pass UL-94 V-0 rating,indicating that MPA shows good flame retardant effect for EP.Cone calorimetry results revealed that the introduction of MPA reduced the heat release rate and total heat release of EPsignificantly, and it exhibited excellent smoke suppression performance.