Polypropylene/clay nanocomposite: kinetic and thermodynamic of dyeing with various disperse dyes

The preparation of polypropylene/clay nanocomposite fibers is interesting from the point of dyeability. This paper investigated the kinetics and the thermodynamic parameters of polypropylene/nanoclay dyeing with three disperse dyes as common dyestuffs for non-polar polymer (C. I. Disperse Blue 60, C. I. Disperse Red 324, and C. I. Disperse Yellow 211). The physicochemical parameters of dyeing are calculated in terms of sorption isotherm, standard affinity, enthalpy and entropy changes, and diffusion coefficient as well as activation energy of the diffusion. The sorption of disperse dye on polypropylene/nanoclay composite shows the linear isotherm. The value of dyeing rate constant and diffusion coefficient of dye molecules increases with the dyeing temperature. The standard affinity of Disperse Red 324 to polypropylene/nanoclay fiber is higher than the two other dyes due its higher partially polarity.