Thermal
degradation of wood treated with flame retardants |
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Authors: | M Gao C Y Sun C X Wang |
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Institution: | (1) Department of Safety and Environmental Engineering, North China Institute of Science and Technology, National Safety Training Center of Coal Mines, Yanjiao Beijing, P. R. China, 101601, 206;(2) Department of Basic Subject, North China Institute of Science and Technology, National Safety Training Center of Coal Mines, Yanjiao Beijing, P. R. China, 101601, 206 |
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Abstract: | Wood,
one of the most flammable materials, was treated with various compounds containing
nitrogen, phosphorus, halogens, and boron. For a study of flame retardance
from the standpoint of thermal degradation, the samples were subjected to
thermogravimetry (TG), differential thermal analysis (DTA) and differential
thermogravimetry (DTG) in nitrogen to determine if there were any characteristic
correlations between thermal degradation behaviors and the level of flame
retardance. From the resulting data, kinetic parameters for different stages
of thermal degradation are obtained using the method of Broido. The energies
of activation for the decomposition of samples are found to be from 72 to
109 kJ mol–1. For wood and modified wood,
the char yields are found to increase from 10.2 to 30.2%, LOI from 18 to 36.5,
which indicates that the flame retardance of wood treated with compounds is
improved. The flame retardant mechanism of different compounds has also been
proposed. |
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Keywords: | degradation DTA DTG flame retardant TG wood |
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