利用CONE研究阻燃胶合板的动态燃烧行为

利用锥形量热仪CONE调查了磷氮硼系阻燃剂FRW处理胶合板在不同热辐射通量条件下的动态燃烧行为.结果显示:随热辐射通量提高,未阻燃胶合板的热释放速率峰值、烟气释放量和火势增长指数上升明显,火灾危险性高;阻燃胶合板的成炭率较高、热释放和烟释放较低;在燃烧过程中CO产率受热辐射通量增大的影响较小;FRW能显著抑制胶合板的可燃性,从而降低胶合板在使用过程中的火灾安全风险.

Dynamic Combustion Behaviors of Plywood Treated with Fire Retardant Using CONE Calorimeter

Fire safety of interior wooden structures is closely associated with the flammability of indoor wooden structures. The effect of the treatment with phosphoric nitrogen boric(P N B) components based fire retardant FRW on the dynamic combustion behaviors of the plywood was investigated using a CONE calorimeter at a heat fluxes of 25, 50 and 75kW/m2 respectively. The results show that the peak value of heat release rate(pkHRR), quantity of smoke release, and fire growth index(FGI) of untreated plywood are quite high, suggesting a high fire risk. The treatment of plywood with a P N B components based fire retardant FRW results in a greater char yield and less release of heat and smoke compared to those of untreated controls; Increasing fire intensity during test only slightly influenced the yield of carbon monoxide. Consequently, it demonstrates that the treatment with P N B components based fire retardant FRW can significantly restrain the combustion and reduce the yield of heat and smoke.