Abstract: The PA6/CB masterbatch was prepared in the torque rheometer after CB was treated with different hyperdispersants in different organic solvents, which was used to prepare the PA6/CB composites. The dispersion of CB in the masterbatch, the processability of the masterbatch, and mechanical properties of PA6/CB composites were investigated. When CB was treated with polyurethane and dispersed in DMF, it was finely dispersed in PA with an average size of 50~70 nm. When the contents of masterbatch was 5 wt%, the tensile strength of PA6/CB composite was 105 MPa, 39 % higher than that of neat PA6.

Key words: PA6, carbon black, hyperdispersant property, Color Concentrate