Abstract: EAA/LDH masterbatch and PE-HD/LDH composites were prepared by melt blending; the interaction between EAA and LDH, and the compatibilization of EAA in the composites were studied. It showed that EAA had released the original interlayer exchangeable carbonate anions of the LDH, and reacted with LDH forming carboxylic acid-metal ionic bond. EAA partially destroyed the long-range order in LDH and thus weakened its diffraction peaks. EAA acted as an effective compatibilizer for the composite, enhanced the interfacial adhesion between LDH and PE-HD obviously, promoted the dispersion of LDH in the matrix; The mechanical properties measurements showed the mechanical properties of the composites containing EAA were better than those without EAA, both tensile strength and toughness of the composites increased simultaneously.

Key words: high-density polyethylene, reactive compatibilization, composite, ethylene acrylic acid, layered double hydroxide