The effect of calcium carbonate nanoparticles and compatibilizer on surface roughness and surface scratch resistance of the polyamide 6

Due to the widespread use of polyamides in various industries and the need to achieve high resistance to surface scratches and optimum surface roughness, in this paper, surface roughness and surface scratch resistance of polyamide 6 reinforced with nanoparticles of calcium carbonate and maleated polyamide (PA-g-MAH) as compatibilizer based nanocomposites specimens have been investigated. For this purpose, components of nanocomposit specimens, with the different weight of nanoparticles of calcium carbonate, by twin coil extruder mixtured and specimens by the method of injection molding were prepared. To perform the hardness scratch test, the nano-coupled hardness device was used in the atomic force microscope, which has a nanoscale test instrument equipped. In order to study the roughness and surface scratch resistance of the specimens, the effect of three variables, vertical force of the scratch, the weight of the reinforcing phase and the compatibilizer have been investigated. The results show that increasing vertical force in all specimens reduces scratch resistance and increases relative height and scratch strength. Addition of calcium nano carbonate particles also increases surface roughness and scratch resistance.