FRICTION AND WEAR PROPERTIES OF PURE AND TEFLON-FILLEDPOLYESTERS DETERMINED ON ALARGE-SCALE TRIBOTESTER

摘要

High strength polymers are used in heavily loaded sliding applications because of their self-lubricatingrnability. Tribological properties are however traditionally determined on small-scalerntribotesters. Present research on large polymer specimens reveals that pure polyethylene-terephtalaternis prone to heavy stick-slip and overload when slid against steel counterfaces.rnTherefore solid lubricant is added, allowing for stable friction and low wear rates. When slidingrnagainst stainless steel, friction is lowered. Wear measurements are discussed in correlation torncreep and thermal deformation. The sliding surfaces are observed by optical microscopy andrnorientation effects are illustrated with Raman spectroscopy. Large-scale test results are comparedrnto small-scale tests, allowing for extrapolation and more accurate design information.