Tribological and mechanical properties of lubricant filled microcapsules in thermoplastic composites

Polymeric materials with long lifetime and low frictional energy loss are frequently required for a broad range of applications. Microencapsulation lubricating oils by in-situ polymerization (melamine-formaldehyde) interfacial (polyurethane/polyurea) was used to obtain free-flowing powders, which can be as additive thermoplastic resulting in microcapsule-containing self-lubricating composites. The specific functionality such composites is achieved via portioned localised release the lubricant areas interface, experiences highest degrees stress wear due friction. Friction-triggered on-demand oil results higher resistance potentially leading new products prolonged lifetime. In this study, different ratios microcapsules were added polyoxymethylene (POM) polybutylterephthalat (PBT) matrices using laboratory scale twin-screw extruder composite materials. effect modification on tribological mechanical properties investigated. Rotational ball disc tests investigate coefficient friction varied microcapsule concentrations. Tensile revealed decreased stability content regardless wall material composition. Addition 5 wt.- % encapsulated led substantial decrease coefficients. Further increase 10 wt.-% had major decreasing impact properties, whilst performance rather small.