Thermal Degradation of Wood Treated with Amino Resins and Amino Resins Modified with Phosphate in Nitrogen

Abstract

The thermal degradation of wood treated with amino resins and amino resins modified with phosphate has been studied by differential thermal analysis (DTA) and thermogravimetry (TG) in nitrogen. 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 flame-retardant wood, the char yields are found to increase from 7.2 to 28.0% limiting-oxygen-index (LOI) from 18 to 36.5, which indicates that the flame retardancy of wood treated with flame retardants is improved. The thermal degradation mechanism of wood treated with different flame retardants has been proposed. The differences between thermal decomposition in air and nitrogen have also been discussed. The IR spectra of the chars of samples indicates formation of aromatic compounds containing C=O and P=O.