Preparation and properties of nanosilica-filled polypropylene composites with PP-methyl POSS as compatibiliser

Nanosilica-filled polypropylene composites, containing 1, 2, 3, 4 and 5 wt% of fumed silica nanoparticles were prepared using a thermo Haake internal mixer. Polypropylene-methyl polyhedral oligomeric silsesquioxane (PP-methyl POSS) was introduced into the system as a compatibiliser. The composites were characterized by performing tensile and impact testing as well as SEM analysis. From the mechanical test results, it was found that PP-methyl POSS was effectively enhanced the tensile properties of the composites at lower nanosilica content. The enhancement of the properties of nanosilica-filled polypropylene composites was attributed to a better dispersion of nanosilica and increased compatibility between silica and polypropylene matrix with the presence of PP-methyl POSS as compatibiliser. (C) 2008 Elsevier Ltd. All rights reserved.