环保型溴—锑阻燃体系在聚苯乙烯中的应用

用十溴二苯乙烷(DBDPE)和三氧化二锑(Sb_2O_3)组成的协效阻燃体系作为聚苯乙烯(PS)的阻燃剂,采用熔融共混制备PS片材,并探究了不同配比下,Br/Sb阻燃剂的阻燃效果。结果表明,DBDPE和Sb_2O_3之间存在很好的协效作用,Br/Sb阻燃剂的加入明显提高了PS的热稳定性及阻燃性能。当PS/(Br+Sb)的质量比为83/17(其中Br/Sb质量比为17/3)时,片材的阻燃性能最佳,其UL94测试达到V–0级别,极限氧指数可达30.1%。在力学性能方面,Br/Sb阻燃剂的加入对PS材料的冲击强度影响较小,其拉伸强度有明显降低。

Application of Environmental Bromine-Antimony Flame Retardant System in Polystyrene

Synergistic flame retardant system composed of decabromodiphenyl ethane (DBDPE) and antimony trioxide (Sb2O3) was used in polystyrene (PS). The PS board composites were prepared by melt blending-extruded,and the flame retardant effect of Br /Sb flame retardant was investigated under different proportions. The experimental results show that there is a good synergistic effect between DBDPE and Sb2O3. The addition of Br/Sb flame retardant improves the thermal stability and flame retardancy of the composites. When the mass ratio of PS/Br+Sb =83/17 (Br/Sb=17/3),the flame resistance of the composites is the best,and the UL94 test reaches the V-0 level,LOI up to 30.1%. In terms of mechanical properties,the addition of Br/Sb flame retardant does not have much effect on the impact strength of the material,and the tensile strength of the material is weakened.