【摘 要】
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Poplar samples were impregnated with ammonium polyphosphate fire retardant at various pressures and durations after they were pretreated with microwave heating.The effects of the pressure and duration
【机 构】
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Material Science and Engineering college,Central South University of Forestry and Technology,Changsh
【出 处】
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第六届全国生物质材料科学与技术学术研讨会
论文部分内容阅读
Poplar samples were impregnated with ammonium polyphosphate fire retardant at various pressures and durations after they were pretreated with microwave heating.The effects of the pressure and duration on the flame-retardation and smoke-suppression properties were investigated with cone calorimeter analysis.The peak heat release rate(pk-HRR),total heat release(THR)and total smoke product(TSP)of treated woods were measured for samples of pretreated and untreated with microwave.After the impregnation,the poplar wood showed the significant improvement in its fire resistance.Compared with non-impregnation wood,the pk-HRR,THR,TSP of wood impregnated with ammonium polyphosphate at pressure of 0.4MPa and duration of 10 min were 48.29%,35.58%,68.64%less,respectively.The pk-HRR,THR and TSP of microwave pretreated wood was 15.89%,5.69%and 13.59%less than those without microwave pretreated sample.The microwave pretreatment of wood can increase fire retardant effectiveness of ammonium polyphosphate-impregnated wood.
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