Abstract:

In order to dye ultra high molecular weight polyethylene (UHMWPE) fibers, the dyeing properties of methyl yellow disperse dye with high planarity and super hydrophobic structure were studied. the effects of dyeing processes such as temperature, time, pH value and the dosage of AEO-9 on the result of the dyed UHMWPE fiber were investigated. Furthermore, The dyeing kinetics and thermodynamics of methyl yellow dye on UHMWPE fiber were studied. The results showed that methyl yellow dye had good dyeing performance on UHMWPE fiber. The optimization process was achieved at the concentration of dispersant 0.3 %, 130 ℃ for 60 min, pH=5,and the color fastnesses of dyed fiber were higher than rating 3-4. Through simulating and calculating the experimental data, results indicated that the adsorption process of methyl yellow dye onto UHMWPE fiber fitted the Nernst distribution mechanism，the half-staining time was 24.34 min, the diffusion coefficient at 130 ℃ was 5.21 × 10-17 m2·s-1, and the standard affinity is about 5.56 kJ ·mol-1.

Key words: ultrahigh molecular weight polyethylene fiber, disperse dye, thermodynamics, dyeing, kinetics