可膨胀石墨/氢氧化铝复配改性聚氨酯泡沫的阻燃性能

Flame Retardation of Polyurethane Foams Modified with Expandable Graphite and Aluminum Hydroxide

摘要: 将可膨胀石墨(EG)与氢氧化铝(ATH)作为阻燃剂添加到硬质聚氨酯泡沫材料(RPUF)中,制备了EG和ATH单独改性RPUF以及EG/ATH复配改性RPUF(总加入量保持30质量份不变),研究了单独改性RPUF和复配改性RPUF的氧指数及阻燃性能.结果表明:EG/ATH复配可产生明显的协同阻燃效果,EG15/ATH15复配改性RPUF的氧指数达到了31%;与未改性RPUF相比,EG15/ATH15复配改性RPUF的热释放速率峰值由148.8 kW·m-2降至66.1 kW·m-2,烟释放速率峰值由0.106 m2·s-1降至0.047 m2·s-1;复配改性的阻燃效果总体比单独改性的好.

Abstract: Expandable graphite (EG) and aluminum hydroxide (ATH) were incorporated into rigid polyurethane foam (RPUF) to prepare single-modified RPUF by EG and ATH respectively,and compound-modified RPUF by EG and ATH.Oxygen index and flame retardation of the RPUFs were studied.The results indicate that the synergistic flame retardant effect was significant when EG and ATH was used in combination,and the oxygen index of the EG15/ATH15 compound-modified RPUF up to 31%.Compared with the RPUF before modification,heat release rate peak of the EG15/ATH15 compound-modified RPUF decreased from 148.8 kW·m-2 to 66.1 kW·m-2,smoke release rate peak reduced from 0.106 m2·s-1 to 0.047 m2·s-1.Flame ratardant efficiency of compound-modified RPUF was better than that of single-modified RPUF.