An experimental study of the scratch properties of poly(methyl methacrylate) as a function of the concentration of added slip agent

A scratch test was performed on poly(methyl methacrylate) (PMMA) material that had been optimised for electronic products. In this study, the scratch properties of PMMA containing various concentrations of slip agent were investigated by performing scratch tests under two different load conditions, i.e., a static normal load and a variable normal load. The effects of the concentration of slip agent on the scratch properties of PMMA were characterised by some key tribological parameters, based on a new standard test methodology. Additionally, the damaged surfaces of the specimens were investigated to understand the variations in scratch mechanisms.

► The slip agent increases the tensile toughness up to 2 wt% of the slip-agent.
► The slip agent decreases the COF value and increases the surface energy.
► There is a limit of the slip agent to improve the scratch due to the haziness.