INFLUENCE OF SURFACE LAYER STRUCTURE FORMED DURING THERMAL DEGRADATION OF WOOD ON SMOKE GENERATION PROPERTY

Wood—hazard material that generate a lot of smoke in case of fire. In combination with toxic gases of thermal degradation it may result in destructive consequences include deaths. Some fire retardants are capable to change thermal degradation process of wood reducing the number of smoke. In that paper influence of phosphorus-containing compounds on smoke generation have been considered. In paper there are used some of the physico-chemical methods (porous structure methods BET
BJH, IR-spectroscopy, elemental analysis) and standard method for determination of smoke generation properties of building materials. In the result the most effective compound and offered the mechanism of effective smoke suppression in the presence of diethylphosphate are selected. Wood with diethylphosphite in case of fire has the minimal smoke generation. This effect can be explain by analysis of porous structure of surface layer after thermal degradation. Results of elemental analysis and IR-spectroscopy indicate high content of elemental phosphorus in the surface layer.