Abstract: PP was cross-linked with silane via twin-screw extrusion. Using AC as a blowing agent, foamed PP board was prepared by compression molding in which the bubble was well distributed and the hole was very meticulous. The effect of the processing parameters on the impact and bending strengths, and the density of board were investigated. PP board with the optimal performance was obtained when the content of foaming agent was 2.5 phr, the foam control agent was 8 phr, the molding temperature was 195 ℃, the pressure was 20 MPa, and the compression time was 17 min.

Key words: polypropylene, foaming, board, processing parameter, property