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采用极限氧指数(LOI)测试、垂直燃烧UL-94测试、热重分析(TG)和锥形量热仪(CCT)测试研究了膨胀阻燃剂(IFR)/白度化包裹红磷(WMRP)对ABS复合材料的阻燃性能和热稳定性的影响。其中IFR是由硅包裹APP(SiMCAPP)和可膨胀石墨(EG)以质量比为1∶3的比例组成的。结果表明,固定IFR和WMRP总质量分数为15%时,当WMRP的添加量为3%(wt,质量分数,下同)时,阻燃ABS复合材料LOI值最大为30.2%,UL-94测试达到V-0级,阻燃材料在700℃的残炭率为23.7%。锥形量热仪实验表明,相对于纯ABS添加3%WMRP的复合材料其最大热释放速率降低至201.8KW/m~2,总的热释放速率降低至60.7MJ/m~2,总烟释放量降低了47.9%。研究结果显示WMRP与膨胀阻燃剂之间存在阻燃协效作用,加入适量的WMRP可以提高膨胀阻燃剂阻燃效果。
The effects of intumescent flame retardant (IFR) / whiteness-encapsulated red phosphorus (WMRP) were studied using the limit oxygen index (LOI) test, the vertical combustion UL-94 test, the thermogravimetric analysis (TG) and the cone calorimeter (CCT) ) On the flame retardancy and thermal stability of ABS composites. The IFR consists of silicon-coated APP (SiMCAPP) and expandable graphite (EG) in a mass ratio of 1: 3. The results showed that the maximum LOI of flame-retardant ABS composites was 30.2% when the WMRP content was 3% (wt, mass fraction, the same below) when the total mass fraction of IFR and WMRP was 15% Reached V-0 level, flame retardant material at 700 ℃ carbon residue rate was 23.7%. Cone calorimeter experiments showed that the maximum heat release rate decreased to 201.8KW / m ~ 2 and the total heat release rate decreased to 60.7MJ / m ~ 2 compared with pure ABS with 3% WMRP. The total smoke release Reduced by 47.9%. The results show that there is a flame retardant synergetic effect between WMRP and intumescent flame retardant. Adding appropriate amount of WMRP can improve the flame retardant effect of intumescent flame retardant.