Combustion Characteristics of Flame-retarded Wood

It is highly recommended to use TG-DSC in various atmospheres to measure the combustion characteristics of flame-retarded wood. The measurement procedure is as follows  

The chemical composition of wood is complex. Its main components consist of cellulose, hemicelluloses, lignin and extractives. The amount of each component varies with the tree species and tree part. For flame-retarded wood prepared by treating with a retardant, care should be taken in order to obtain homogeneous samples. Select a suitable amount of the sample from representative parts of the wood, then grind the sample 

Measure the sample under various atmosphere conditions, such as static air or O2 flow. 

The mass-loss fraction of wood treated with flame retardant is greater than that of untreated wood in the initial stage, but it subsequently becomes smaller. The wood with less mass loss in the second stage allows better flame retar-dancy. Furthermore, wood that has a small exothermic enthalpy and a higher final decomposition temperature on the DSC curve has better flame retardancy. The exothermic enthapy (AH) and final decomposition temperature (T() of fibreboard without flame retardant were 7.66 kjg and 556.0 °C, respectively, whereas those of fibreboard treated with flame retardant were 5.49 kj g and 587.5 °C, respectively. 

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