Keyword: «extrusion»

The paper shows the possibility of processing composites based on UHMWPE by extrusion by adding a low-viscosity grade of polyethylene and stearic acid. It is shown that the best indicators of physico-mechanical properties and dynamic viscosity coefficient are achieved for PCM based on UHMWPE with the introduction of 5 wt. % polyethylene and 5 wt. % stearic acid. The possibility of modifying such composites with fibers and processing them using extrusion technology has also been established, which, with further refinement of the technology, will improve the operational properties of the composite based on UHMWPE and PE.

Accelerated climatic tests of extruded composites based on UHMWPE have been carried out. It has been established that stearic acid, used as a plasticizer, is washed out when exposed to climatic factors. At the same time, a significant degradation of the physical and mechanical characteristics of materials is observed. It has also been shown that the addition of a CO-4 stabilizer as an antioxidant improves the climatic resistance of materials based on UHMWPE, however, their fluidity and extrudability noticeably worsen.