POLYMERIC ALLOYS - MP-UHMWPE

Ultra High Molecular Weight Polyethylene (UHMWPE) with all its advantages (good physical and mechanical properties, impact resistance, abrasion resistance, chemical and radiation resistance, biostability and biocompatibility), is practically not melt-processible. The main reason is high melt viscosity. This is because of the special morphology of long chains that represent a "confused tangle“. As a result, when the melt temperature is reached, the material behaves as a "pseudo-crosslinked gel", leading to inability of melt mixing. The "chains mobility" of polymer is significantly reduced, which eventually leads to the fact that all the end products of such processing have "fusion defects " and strong graininess.