用CONE法研究木材阻燃剂FRW的阻燃性能

A STUDY ON THE FIRE RETARDANCY OF FRW FIRE RETARDANT FOR WOOD BY CONE CALORIMETER

利用锥形量热仪 (CONE)系统地测定了新型木材阻燃剂FRW的阻燃性能 ,讨论了FRW对阻燃木材在燃烧时的热释放、质量变化及耐点燃性的影响 ,并与Dricon阻燃剂进行了对比。结果表明 ,在 5 0kW·m2 的热辐射功率下 ,FRW阻燃处理木材的热释放速率 (RHR)和总热释放量 (THR)随FRW载药率的升高而降低 ,至载药率达到 10 %左右时 ,RHR及THR降低为未处理木材的 5 0 %左右 ,并且降低的趋势明显变缓 ;FRW与Dri con阻燃木材的有效燃烧热 (EHC)曲线基本重合 ,说明二者的阻燃机理类似 ;FRW阻燃木材的质量损失速率(MLR)曲线与RHR曲线相似 ,失重和热释放主要发生在有焰燃烧阶段 ;FRW阻燃处理能显著提高木材燃烧时的成炭率 ,但对木材的点燃时间影响不大 ;FRW与Dricon的阻燃效力相当 ,属高效木材阻燃剂。

The fire retardancy of FRW,a new fire retardant for wood,was systematically studied by cone calorimeter and Dricon fire retardant was used for comparison.The cone calorimetric results showed that:(1)at a heat radiation of 50kW·m -2 ,the Heat Release Rate (RHR) and Total Heat Release (THR) of FRW treated wood decreased considerably with the increase of FRW retention,but this decrease slowed down as the FRW retention was near 10%( W t/ W t),and the RHR and THR values of FRW treated wood were about 50% of those of the untreated wood;(2) the curves of Effective Heat of Combustion( EHC ) of FRW and Drion were nearly the same,which suggested that the fire retardant mechanism of FRW is similar to Drion;(3)the curve of Mass Loss Rate (MLR) of FRW was similar to its RHR curve,and the weight loss and heat release of FRW treated wood took place mainly in the flaming period of combustion;(4)the FRW treatment of wood could drastically increase its charring,while its ignition time was not influenced too much;(5)the fire retarding efficiency of FRW is similar to Dricon and both of them are highly effective fire retardants.