Thermal degradation of cellulose and its phosphorylated products in air and nitrogen

摘要: The thermal degradation of cellulose and its phosphorylated products (phosphates, diethylphosphate, diphenylphosphate) were studied in air nitrogen by differential analysis dynamic thermogravimetry from ambient temperature to 750°C. From the resulting data various thermodynamic parameters obtained following methods Broido Freeman Carroll. values Ea for decomposition found be range 55–138 kJ mol−1 85–152 depended upon percent phosphorus contents samples. mass spectrum cellobiose phosphate indicated absence molecular ion, indicating that compound was thermally unstable. IR spectra pyrolysis residues gave indication formation a having CO PO groups. A fire retardancy mechanism has been proposed.