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Metallic effect in injection molded parts is created using composites of high‐density polyethylene (HDPE) filled with high‐sparkle aluminum (Al) pigments (HDPE/Al). The mechanism of micro shrinkage induced by the leafing phenomenon influences the surface topography and roughness, and has been studied with SEM and AFM. Reflectance, whiteness index (WI), and luminance (L*) of the surface were assessed...
An ultrasound‐assisted extrusion system was added to melt extrusion process to prepare polypropylene (PP) nanocomposites reinforced with graphene nanoplatelets (GNPs). The relationships among the ultrasound vibration, exfoliation, and dispersion morphology of GNPs in PP matrix, the crystallinity, and the macroscopic properties of nanocomposites were investigated. The properties measurement results...
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