STRUCTURE AND PROPERTIES OF SELF-REINFORCED POLYETHYLENE PREPARED BY OSCILLATING PACKING INJECTION-MOLDING UNDER LOW-PRESSURE

This article reports the influence of oscillating pressure on the mech anical performance of general-grade high-density polyethylene (HDPE). The tensile strength of 93 MPa and the Young's modulus of 5 GPa were o btained by an oscillating packing technique. The great improvement of the mechanical properties of HDPE specimens is due to the existence of the shish-kebab crystalline structure, the orientation of the molecul ar chains along the flow direction, and the more perfect crystallites. (C) 1995 John Wiley and Sons, Inc.