Abstract: Polypropylene/maleic anhydride grafted polypropylene/hollow glass bead (PP/PP-g-MAH/HGB) composites were prepared via extrusion molding. The nonisothermal crystallization behavior of the composites was investigated using differential scanning calorimetry. The nonisothermal crystallization kinetics of the composites was analyzed by Jeziorny and Mo equation. It was found that crystallization temperature, initial crystallization temperature, and crystallinity of PP, PP/HGB, and PP/PP-g-MAH/HGB were decreased, and the crystallization rate was increased with increasing cooling rate. The crystallization rate of PP was decreased by adding HGB. The mechanisms of nucleation and growth of crystallization were changed by mixing HGB and PP-g-MAH.

Key words: polypropylene, hollow glass bead, maleic anhydride grafted polypropylene, nonisothermal crystallization kinetics