Study on the Thermal Degradation of Wood Treated with Amino Resin and Amino Resin Modified with Phosphoric Acid

Abstract

Wood has been treated with amino resins and amino resins modified with phosphoric acid to impart flame retardancy. The thermal degradation of samples has been studied by differential thermal analysis (DTA) and thermogravimetry (TG) in air. From the resulting data, kinetic parameters for different stages of thermal degradation are obtained following the method of Broido. For the decomposition of wood and flame retardant wood, the activation energy is found to decrease from 122 to 72 kJ mol⁻¹, the char yield is found to increase from 6.0 to 30.8%, LOI from 18 to 40.5, which indicates that the flame retardancy of treated wood is improved. Effects of the different flame-retardants on the thermal degradation and flammability of wood have also been proposed.

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References

1. Goldstein, I.S. and Dreher, W.A. (1964). U. S. 3,159,503.

2. Juneja, S.C. (1975). U. S. 3,887,511.

3. Bhagwan, J. and Lal, K. (1990). J. Polym. Mater., 7: 231 .

4. Getto, H. and Ishihara, S. (1998). The Functionally Graded Wood Observed from Chemical and Thermal Perspectives , Fire Mater., 22: 141 .

5. Bagga, S.L., Jain, R.K., Gur, I.S. and Bhatnagar, H.L. (1990). Thermal and Spectroscopic Studies on Flame Retardant Cotton Cellulose Modified with THPC-urea-ADP and Its Transition Metal Complexes , British Polymer Journal, 22: 107 .

6. Kaur, B., Gur, I.S. and Bhatnagar, H.L. (1986). Studies on Thermal Degradation of Cellulose and Cellulose Phosphoramides , J. Appl. Polym. Sci., 31: 667 .

7. Kaur, B., Gur, I.S. and Bhatnagar, H.L. (1987). Thermal Degradation Studies of Cellulose Phosphates and Cellulose Thiophosphates , Angew. Makromol. Chem., 147: 157 .

8. Tang, W.K. (1967). US Forest Service Res. Paper, FPL 71, US Dept Agriculture, Forest Prods Lab., Madison, WI.

9. Beal, F.C. and Eickner, H.W. (1970). US Forest Service Res. Paper, FPL 130, US Dept Agriculture, Forest Prods Lab., Madison, WI.

10.

10. Shafizadeh, F. (1985). Cellulose Chemistry and Its Applications, In: Nevell, T.P. and Zeronian, S.H. (eds), Ellis Horwood Ltd., Chichester Charter 11.

11.

11. Jain, R.K., Lal, K. and Bhatnagar, H.L. (1985). Thermal Degradation of Cellulose and Its Phosphorylated Products in Air and Nitrogen , J. Appl. Polym. Sci., 30: 897 .

12.

12. Xu, J.Z. and Gao, M.et al. (2002). Study on The Thermal Degradation of Cellulosic Fibers Treated with Flame Retardants , J. Fire Sci., 20(3): 227 .

13.

13. Hirata, T. and Kawamoto, S. (1991). Thermogravimetry of Wood Treated With Water-insoluble Retardants and A Proposal for Development of Fire-retardant Wood Materials , Fire Mater., 15: 27 .

14.

14. Broido, A. (1969). A Simple, Sensitive Graphical Method of Treating Thermogravimetric Analysis Data , J. Polym. Sci., Part A-2, 7: 1761 .