Abstract: High-density polyethylene/polyamide 6 (PE-HD/PA6) insitu blends were prepared by reactive extrusion from ε-caprolactam (CL) and highdensity polyethylene (PE-HD) in presence of PE-HD grafted maleic anhydride (PE-HD-g-MAH).The influence of screw configuration on the preparation of PE-HD/PA 6 in-situ blends was explored. It was found that the longer the residence time for the screw configuration, the higher the CL monomer conversion of the blend. Among the three configurations, the largepitch screw element provided the smallest diameter of PA6 particles in the blend, since such a configuration was beneficial to the rupture and dispersion of CL in the matrix.

Key words: screw configuration, reacting extrusion, polyamide 6, polyethylene