Combustion characteristics of Pinus rigida specimens treated with mixed phosphorus-nitrogen additives

초록

The combustive properties of Pinus rigida specimens treated with the mixed phosphorus (P)-nitrogen (N) additives were tested. Each P. rigida specimen was painted three times with 15 wt% mixed P-N additive solutions at room temperature. After drying the specimen treated with chemicals, the combustive properties were examined using a cone calorimeter (ISO 5660-1). The time to ignition (TTI) for the specimens treated with the mixed additives was in the range, 70-109 s. The specimens treated with the mixed P-N additives showed a lower peak heat release rate by 3.8-25.5% and lower total heat release by 6.1-22.1% than those of the samples treated with the pure P-N additives. The effective heat of combustion (EHC) for the sample treated with the mixed P-N additives was 15.68-18.70 MJ/kg, which was lower than that of the pure P-N additive plate. Among mixed P-N additives, N,N'-piperazine bis(methylenephosphonic acid) (PIPEABP)/pyrophosphoric acid (PP)/4NH(4)(+) (2:1) had the highest fire performance index (FPI) and lowest fire growth index (FGI). The fire risk of all the samples treated with the P-N additives except sample 2 is much smaller than that of untreated sample and it shows improved fire safety. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

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