Material Emission Parameters Obtained Through Regression

Abstract

Diffusion coefficients ( D) and partition coefficients ( K) of volatile organic compounds (VOCs) from 20 dry building materials were obtained by fitting the predictions using a simplified diffusion model with small-scale chamber data. The materials analysed included 6 carpets, 3 particle boards, 3 plywood boards, 3 gypsum boards, 2 orient stranded boards, 2 acoustic ceiling tiles and 1 under pad. The types of VOCs studied included alkanes, alkenes, alkynes and benzene group compounds, with carbon number ranging from 1 to 15. The regression results include the optimal values and a sensitivity range of D and K. For the 4 alkanes emitted from 6 different carpets, a correlation trend was observed between the D, K and VOC properties (molecular weight and vapour pressure). However, the emission parameters in general are suggested to be related to both the molecular structure of compounds and material properties.