纳米SiO2与RDP协同阻燃PC/ABS的研究

采用间苯二酚双（二苯基磷酸酯）（RDP）及其与纳米SiO2复配制备双酚A聚碳酸酯/丙烯腈-丁二烯-苯乙烯（PC/ABS）阻燃材料，测定了阻燃PC/ABS的极限氧指数、UL94V阻燃性能及热稳定性，采用扫描电子显微镜(SEM)观察了阻燃PC/ABS于600 ℃热分解残余物的形态，采用锥形量热仪测定了阻燃PC/ABS的释热速率峰值（p-HRR）、释热速率平均值（av-HRR）、总释热量（THR）、平均有效燃烧热（av-EHC）和平均质量损失速度（av-MLR）。结果表明，纳米SiO2与RDP添加量分别为5 %和9 %时，PC/ABS的阻燃性能达UL94V-0级，极限氧指数为29.0 %，且阻燃PC/ABS的p-HRR、av-HRR、THR、av-EHC以及av-MLR分别下降了16.12 %、58.82 %、40.83 %、17.91 %和36.90 %，同时也证明了纳米SiO2与RDP具有非常好的协同阻燃效应。

Flame Retardancy of Nano-SiO2 and RDP Flame Retarded PC/ABS and Their Synergism

Blends of bisphenol-A polycarbonate/acrylonitrile-butadiene-styrene(PC/ABS) were flame-retarded by resorcinol bis(diphenyl phosphate) (RDP) and nano-SiO2. The limiting oxygen index, UL94V flame retardancy, and thermal stability of the flame-retarded PC/ABS were measured. The morphology of the pyrolysis residue was investigated by SEM. Cone calorimeter (CONE) was employed to determine peak heat release rate (p-HRR), average heat release rate (av-HRR), total heat rate (THR), average effective combustion heat (av-EHC), and average mass lose rate (av-MLR). When the loadings of nano-SiO2 and RDP were 5 %and 9 %, respectively, a limiting oxygen index of 29 % and V-0 grade were obtained. The values of p-HRR, av-HRR, THR, av-EHC, and av-MLR were decreased by 16.12 %, 58.82 %, 40.83 %, 17.91 %, and 36.90%, respectively.