APP/EG对PIR-PU泡沫材料阻燃性能的影响  

Study of APP/EG on Flame-retardant Performance of PIR-PU Foam

作　　者：李智 任富建 李建平 齐明东 

机构地区：[1]北京建工新型建材有限责任公司研发中心,北京100015

出　　处：《塑料科技》2014年第4期116-119,共4页Plastics Science and Technology

摘　　要：以聚磷酸铵/膨胀石墨(APP/EG)为阻燃剂,制备了高阻燃的聚异氰酸酯-聚氨酯(PIR-PU)泡沫材料。采用极限氧指数(LOI)测试、红外光谱分析(IR)、热重分析(TGA)等方法对所制备PIR-PU泡沫材料的燃烧及热降解行为进行了研究。结果表明:APP与EG存在着良好的协同阻燃作用,APP/EG的添加可有效提高PIR-PU泡沫材料的LOI值,其中当APP/EG用量为25份、其配比为3/7时,PIR-PU泡沫材料具有最佳阻燃性能,材料的LOI值可达35.4%。APP与EG的复配使用,使PIR-PU泡沫材料的炭层较单独使用APP或EG时更为致密,有效提高了材料的热分解温度,降低了热降解速率,进而改善了材料的阻燃性能。A kind of flame-retardant polyisocyanate-polyurethane （PIR-PU） foam was prepared with ammonium polyphosphate/expanded graphite （APP/EG） as flame retardant. The combustion behavior and thermal degradation of the PIR-PU foam were studied through the limiting oxygen index （LOI）, infrared spectrum （IR） and thermal gravimetric analysis （TGA）. The results show that flame-retardant properties of the PIR-PU foam are improved because of the synergistic flame retardancy of APP and EG. The PIR-PU foam exhibits the best performance when the ratio of APP and EG is 317 and the content of APP/EG is 25 phr, and its LOI value can reach to 35.4%. The mixed flame retardant can present a dense char layer of PIR-PU than used them separately, and improve the thermal decomposition temperature, reduce the thermal degradation rate of the PIR- PU foam, then the flame-retardant performances of the flame-retardant PIR-PU foam increase.

关 键 词：聚异氰酸酯-聚氨酯泡沫材料 聚磷酸铵 膨胀石墨 协同阻燃作用 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业] TQ314.248