ZnB/IFR协效阻燃长玻纤聚丙烯

Synergistic Flame Retardant Effect of ZnB/IFRon LGFPP

通过氧指数、垂直燃烧、热失重、锥形量热和电镜扫描研究了由Zn B和IFR组成的协效阻燃体系对长玻纤增强聚丙烯的阻燃性能和机理。结果表明:Zn B与IFR对LGFPP有协同阻燃效果,当Zn B的质量分数为2%时,阻燃效果最佳,材料的热稳定好,极限氧指数可以达到23.5%,垂直燃烧等级为UL94 V-1级;650℃的残炭量达到33.71%,相对于IFR/LGFPP复合体系提高了1.85%;总热释放速率相比较IFR/LGFPP复合体系下降了17.01%;热释放速率峰值为97.26 k W/m2。相对于IFR/LGFPP复合体系的PHHR值下降了13.61%。扫描电镜表明Zn B/IFR协效阻燃的LGPP可以形成颜色深、致密连续、孔洞直径较小且数目少的炭层。

ZnB and IFR association effect of flame retardants for flame retardant performance and flame retardant mechanism of LGFPP was studied. By limiting oxygen index, horizontal and vertical flame, thermogravimetric analysis, cone calorimetry and electron microscope scanning,the results showed that the ZnB , IFR and LGFPP had synergistic flame retardant effect,when ZnB addition amount was 2% （mass fraction） ,composite material had the well flame retardant effect and thermal stability ,the limit oxygen index could reach 23.5% and vertical combustion rating could pass UL94 V-1 rating. Carbon residue of 650 ℃ could reach 33.71% ,and was increased by 1.85% than the IFR/LGFPP composite system. Compared the total heat release rate of IFR/LGFPP composite system had fallen by 17. 01%. The peak heat release rate was 97.26 kW/m^2. Relative to the IFR/LGFPP complex system PHHR value decreased by 13.61%. Scanning electron microscopy showed that ZnB/IFR association effect of flame retardant LGPP could form deep color,continuous,dense hole diameter smaller and less number of carbon layers.