APPLICATION OF CALORIMETRY TO THE STUDIES ON THE PROCESSES OF DYEING OF FABRIC

The possibility of the use of direct thermochemical measurements for the determination of the enthalpic characteristics of the most important processes taking place during the dyeing of textile materials by reactive dyes is shown. It is established that the exothermicity of dyeing decreases with the rise in the degree of association of the dye and the degree of filling of the fibre surface by the dye molecules, and with the decrease in the degree of swelling of cellulose. This testifies to the importance of the entropic factor for the dyeing process of cellulose materials by reactive dyes. © 1990.