Abstract: Benzylated fir powder was solution compounded with polystyrene in CHCl3 forming plastic composites (WPC), the latter was dyed with dispersing dyes and characterized with infrared spectroscopy (IR) and scanning electronic microscopy (SEM). It was found that the dyeing rate of WPC was influenced by the molecular structure and molecular weight of the dispersing dyes. The color shade of dyed WPC was similar to that of dyed polyester fabric, and was becoming deeper with increasing dyeing temperature and increasing dye concentration. The dyeing rate and washing fastness of dyed samples decreased with increasing dye concentration, and increased with increasing temperature.

Key words: polystyrene, benzylated modification, wood-plastic composite, dispersive dye, dyeing