Role of the friction coefficient and viscoelastic effects on the scratch Surface damage of mineral reinforced polypropylene

The effect of surface friction coefficient and molecular elastic recovery on the scratch surface damage of PP/wollastonite composites was investigated. Scratch contour length and scratch surface were considered as acceptable criteria to evaluate the scratch resistance. Therefore, by using image analyzing technique and scanning electronic microscopy (SEM), scratchresistance of samples were characterized. The viscoelastic properties of samples were compared using DMTA tests. The result obtained shown that wollastonite improves scratch resistance of PP. Reduction of the friction coefficient of scratch surface improves the surface damage, and scratch visibility. Also addition of PE reduces significantly the scratch visibility and disappearing scratch surface damage because increasing the elastic recovery

کلیدواژه ها:

Polypropylene ، Wollastonite ، Scratch Resistance ، Friction Coefficient ، DMTA