The Characterization on the Mode of Combustion and Smoke Evolution of Organic Materials in Fire : Part (II)
Analysis on the Change in the Particle-size of polystyrene Smoke Particles by Secondary Oxidation with Respect to the Change in Z-data in L. S. Technique.

Abstract

Characterization on smoke evolution of organic building materials in fire have been pursued with respect to the change in dissymmetry factor Z in light scatterring data.
The change in dissymmetry factor Z has been recognized to be very sensitive to the change in radius of smoke particle by the secondary oxidation in hot environment and above change in Z induced by the change in radius of smoke particle have been also recognized to be influenced by the change in particle size distribution.
Theoretical consideration on the data concerning the change in Z factor, electro-microscopic observation and Royco Particle Counter analysis of smoke particle evolution under respective oxygen partial pressure will suggest that the change in turbidity dC_s/dt in the previous report (Part I) will be mainly due to the change in particle number dN/dt which will depend on thermal decomposition rate dW/d_t of organic materials at high temperature.