Abstract:

Twelve dicyanoethyl-heterocyclic azo disperse dyes were synthesized with four different heterocyclic aromatic amines as the diazo components and three N,N-2-cyanoethyl anilines as the coupling components. They were characterized by UV-Vis, IR and ¹H NMR. Their dyeing performance on polyester fabric, acetylated fir powder and cyanoethylated fir powder was also investigated. The results indicate that the maximum visible adsorption of twelve azo components in DMF is over the range of 417—621 nm with the molar absorptivity beyond 10⁴. The shade of dyed polyester fabric includes yellow, red, reddish violet and blue with the light fastness good and the fastness to washing excellent. The shade and the fastness to washing of dyed acetylated fir powder and cyanoethylated fir powder is close to that of dyed polyester fabric. The dyeing performance of twelve disperse dyes processes wide chromatography range, bright color shade, high intensity of absorption and high fastness. Therefore, a variety of fiber can be dyed by the twelve disperse dyes.

Key words: Disperse dye, Dyeing, Cyanoethyl, Heteroyclic aromatic amine, Modified wood