【摘要】 分别制备了不同配比的双酚A型苯并噁嗪/含磷环氧树脂(BE)二元体系和双酚A型苯并噁嚓/含磷环氧树脂/二氨基二苯砜(BES)三元体系的浇铸体。用差示扫描量热(DSC)研究了各体系的固化反应,用垂直燃烧性能测试、锥形量热测试、热重分析(TGA)、热重-红外联用(TGA-FTIR)等手段,研究了该体系的热降解和阻燃性。结果表明,在双酚A型苯并噁嚓/含磷环氧树脂体系中加人10%的二氨基二苯砜,当含磷环氧树脂量大于50%,BES三元体系浇铸体样条可以达到UL94 V-0级。但在锥形量热测试中,BE二元体系的热释放速率(HRR)和总热释放量(THR)反而低于BES三元体系,显示更好的阻燃性。更多还原

【Abstract】 Different proportions of bisphenol-A type benzoxazine/phosphorus-containing epoxy resin(BE) binary system and bisphenol-A type benzoxazine/phosphorus-containing epoxy resin/diaminodiphenylsulfone(BES) ternary system castings were prepared respectively.The differential scanning calorimetry(DSC) was used to study the curing reaction.The vertical burning test,cone calorimeter test,thermogravimetric analysis(TGA) and thermogravimetric analysis/infrared spectrometry(TGA-FTIR) were used to study the thermal degradation and the flame retardancy of the system.The results showed that when phosphorus containing epoxy resin was greater than 50%,adding 10%-diaminodiphenylsulfone into the bisphenol A type benzoxazine/phosphorus containing epoxy resin system,the BES ternary castings can be achieved UL 94 V-0 level.But in cone calorimeter tests,BE binary system heat release rate(HRR) and total heat release(THR) were lower than those of BES ternary system which showed better flame retardancy.更多还原