ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE ADDED WITH CARBON NANO-TUBES AND PROCESS FOR PREPARING THE SAME

摘要

PURPOSE: A ultra high-molecular weight polyethylene (UHMWPE) containing carbon nano-tube(CNT) is provided to enhance wear-resistance of the polyethylene by dispersing the polyethylene and CNT in a solvent, then molding the obtained powder after vaporizing the solvent. CONSTITUTION: The UHMWPE containing CNT comprises 0.1 to 0.5 weight parts of CNT based on 100 weight parts of the UHMWPE. The UHMWPE is produced by a process comprising steps of entering the powdery UHMWPE in toluene solvent and dispersing it for 0.5-1 hour by way of ultrasonic treatment; adding 0.1 to 0.5 weight parts of CNT into the dispersed polyethylene based on 100 weight parts of the UHMWPE and dispersing again it for 0.5-1 hour by way of the ultrasonic treatment, then naturally vaporizing the solvent in a hood; and forming the obtained powdery mixture in a mold at 150-200deg.C and the pressure of 20-30MPa for 1-2 hours.