Abstract:

The structures of the solid state products formed by the limited combustion of Korean Pine(Pinus koraiensis) wood treated with fire-retardant FRW were analyzed by microscopic FTIR. The volatile pyrolytic products of basswood(Tilia amurensis) specimens treated with FRW (FZ) and its components GUP (GZ)and boric acid (BZ) respectively were analyzed by GC-FTIR. The pyrolytic and charing process, the effects of fire-retardant and the structural characteristics of the pyrolytic products were discussed. It was concluded that upon heating and by the catalysis of FRW and its decomposition products reactions of wood took place successively, namely the dehydration of polysaccharide, the elimination of acetic acid from hemicellulose, the degradation of polysaccharide, the degradation of lignin, the polymerization of the pyrolytic products of wood, reactions of oxygen-element-elimination of aliphatic polymers and the structural change of the later to form aromatic structure, and charing. The pyrolysis process of wood was altered and the yield of volatile pyrolytic products was decreased by FRW treatment.

Key words: wood, fire-retardant FRW, fire-retardant mechanism, FTIR, GC-FTIR