苯基改性聚氨基环三磷腈对环氧树脂固化物的阻燃作用∗

摘要

通过锥形量热分析研究了苯基改性聚氨基环三磷腈(BPHACTPA)对酚醛胺固化环氧树脂(E-44/NX-2003)的阻燃作用,结果表明 BPHACTPA 对 E-44/NX-2003有明显的阻燃作用,添加质量分数30％的 BPHACTPA,E-44/NX-2003的总热释放量、最大热释放速率、平均热释放速率、平均有效燃烧热和平均质量损失速率分别降低了30．5％、56．9％、53．2％、22．1％和16．6％,达到热释放速率峰值所需时间和完全燃烧时间分别从83 s 和240 s 增加到了135 s 和330 s.锥形量热实验的残余物分析表明, BPHACTPA 主要是通过促进 E-44/NX-2003炭化,并在 CO 2、N2和 NH 3等惰性气体的发泡作用下形成膨胀性炭层而产生阻燃作用.%The flame retardancy of polyaminocyclotriphosphazene modified with phenyl(BPHACTPA) in epoxy resin cured with phenolic amine (E-44/NX-2003)is investigated by cone calorimetry test.The results showed that BPHACTPA)has a good flame retarded effect in E-44/NX-2003,when its dosage is 30% based on the total weight of composites,total heat release,peak heat release rate,average heat release rate,average effective heat of combustion and average mass loss rate are reduced respectively by 30.5%、56.9%、53.2%、22.1% and 1 6.6%,the time for peak heat release rate and complete combus-tion are increased respectively from 83s and 240s to 135s and 330s.The analysis of residues obtained in cone calorimeter test reveals that BPHACTPA plays a flame retardancy mainly by promoting the char-ring of E-44/NX-2003,and the char is changed into the intumescent layer by the foaming of CO 2 ,NH 3 and N2 released from the decomposition of the composite.