Influence of acrylic acid grafting on dyeing property of nylon 66

The research target of this paper was grafting modification of nylon 66 using acrylic acid.The cationic dye of Cationic Red 5BL was used to dye the modified fiber at 95 ℃.The dyeing properties of the modified nylon 66 fiber in mild acidic condition were researched.The effect of grafting rate on the dyeing kinetics of the nylon 66 with cationic dye was investigated.The results showed that the type of adsorption isotherm of cationic dye on acrylic grafted nylon 66 fibers conforms to Langmuir distribution mechanism.Compared with the conventional nylon 66 fibers dyed with cationic dyes,the dyeing of acrylic grafted nylon 66 fibers has such advantages of faster dye uptake rate,shorter half-dyeing time,enhanced diffusion coefficient and dyeing affinity and rating of washing fastness increased by 0.5 to 1.