Cellular UHMW Polyethylene Produed by Non-Foaming Leaching Technique: Morphology and Properties

Abstract

The objective of the research was to develop and study the properties of cellular or porous Ultra High Molecular Weight (UHMW) Polyethylene for biomedical applications. The process, based on the leaching technique, does not require any modification in processing equipment, is environment-friendly and uses raw materials approved by the FDA for in vivo medical applications. It is possible to produce porous polymers having predetermined pore size, pore shape and porosity using the leaching technique. The pores are interconnected and well-distributed throughout the threedimensional volume of the sample. The size, shape and content of the porogen in the molding mixture greatly affect the physical properties of the pores in the final porous sample. Maximum porosity of 60% was obtained. The developed porous UHMW Polyethylene, which is permeable by liquids, can be used as a substrate matrix in bone regeneration and in hip-and knee joint replacements. With adequate lubrication, the porous implants would prevent the formation of polymer debris due to friction and thereby increase the life of the biomedical implants. The new generation of developed porous polymers could be used in a wide range of medical and bioengineering applications.