Abstract:

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%(Wt/Wt),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.

Key words: Wood, Fire retardant, Fire retardancy, Cone calorimeter, FRW