含磷POSS阻燃乙烯基酯树脂性能研究

Properties of phosphorus-containing POSS flame retardant vinyl ester resin

将含磷POSS(DMPOSS)以5wt%、10wt%和15wt%的添加量添加到乙烯基酯树脂中,通过差示扫描量热仪(DSC)、热重分析(TG)、极限氧指数(LOI)、锥形量热仪和扫描电镜(SEM)测试研究了DMPOSS对乙烯基酯树脂玻璃化转变温度、热稳定性和燃烧性能的影响。DSC测试结果表明:DMPOSS的加入能够明显提升乙烯基酯树脂的玻璃化转变温度。LOI测试结果表明:添加DMPOSS改性的乙烯基酯树脂的氧指数随DMPOSS含量的增加而逐渐升高。当添加15wt%DMPOSS时,乙烯基酯树脂的氧指数达到23.8%。锥形量热仪测试结果表明:DMPOSS的加入能够有效降低乙烯基酯树脂的热释放。当添加15wt%DMPOSS时,乙烯基酯树脂的热释放速率峰值降低了44.9%,总的热释放降低了30.4%。

Adding phosphorus-containing POSS(DMPOSS)with the dosage of 5wt%,10wt%and 15wt%to vinyl ester resin,the effects of phosphorus-containing POSS addition on the thermodynamic properties,flame resist-ance,and microstructure of vinyl resins were studied by differential scanning calorimetry(DSC),thermo-gravimet-ric analysis(TG),limiting oxygen index(LOI),cone calorimeter and scanning electron microscopy(SEM).The DSC results show that the addition of DMPOSS can significantly increase the glass transition temperature,the LOI results show that the oxygen index of vinyl ester resin increase with the increase of DMPOSS content.The cone calo-rimeter results show that the addition of DMPOSS can effectively reduce the heat release of vinyl ester resin.When adding 15wt%DMPOSS,the peak heat release rate of vinyl ester resin decreased by 44.9%,while the total heat release decreased by 30.4%.