Effect of poly(ethylene oxide) on tribological performance and impact fracture behavior of polyoxymethylene/polytetrafluoroethylene fiber composites

摘要: A novel type of polyoxymethylene (POM)-based composites with polytetrafluoroethylene (PTFE) fiber and poly(ethylene oxide) (PEO) was prepared via melt extrusion in order to enhance the friction lubrication wear resistance POM. The tribological experiments demonstrated that coefficient rate POM were both reduced by incorporation PTFE fiber, furthermore, higher loading better properties. mechanism is derived from thin film formed on contact-surfaces during sliding. addition PEO into POM/PTFE can formation transfer mating surfaces sliding contact, thus further improves performance. behaviors also depend normal duration, under which could form appropriately. In addition, abrasion dispersed domains matrix helpful heat dissipation when counter-surface exerts oscillating forces surface. It should be emphatically mentioned use as additive improve notched impact strength POM, subsequent leads a more significant toughening effect for morphological investigation reveals attributed energy through pullout plastic deformation induced PEO. Polarized optical microscopy demonstrates presence interfere crystallization size spherulites, consequently weakened sensitivity notch. Although POM-based underwent different mode thermal degradation neat slight reduction temperature at rapid weight loss, their stabilities maintained well enough meet requirement its application.