Disperse dyeing of polyester fibers: Kinetic and equilibrium study

✍ Scribed by K. L. Georgiadou; E. G. Tsatsaroni; I. C. Eleftheriadis; A. H. Kehayoglou

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 145 KB
• Volume: 83
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.10254

✦ Synopsis

Abstract

The effect of temperature on the dyeing rate constant k, diffusion coefficient D, time of half‐dyeing t~1/2~ was evaluated for the dyeing of polyester fibers with two disperse dyes, an azo and an anthraquinone dye. Activation energies of diffusion E were calculated. The polyester dyeing equilibrium was also studied and the partition coefficient K and standard affinity Δμ° at various temperatures were determined for the anthraquinone dye. Standard enthalpy Δ__H__° and standard entropy Δ__S__° of dyeing were also obtained. The same equilibrium parameters were not obtained for the azo dye because of its dyeing behavior. A similar kinetic and equilibrium study was made for the pure azo and anthraquinone compounds free from the dispersing agents present in the commercial dyes and the results are discussed. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 2785–2790, 2002; DOI 10.1002/app.10254