SYNTHESIS AND CHARACTERIZATION OF POLYPROPYLENE-SILICA, ALUMINA AND TITANIA NANOPARTICLES, PREPARED BY MELTING

摘要

Polypropylene composites with 5 to 10% of SiO2, Al2O3 y TiO2 nanoparticles were synthesized. The oxides were obtained using the sol-gel technique and were added to the molten polypropylene. The morphology of nanoparticles was observed by scanning electron microscopy and showed that the incorporation of TiO2 and SiO2 gels produces high dispersion of the filler, while the use of Al2O3 results in aggregates of these nanoparticles in the polymer matrix. The X-ray diffractogram of the composites revealed a displacement of characteristics lines of polypropylene and an increment of the interplanar spaces, indicating some interaction between the components and the predominance intercalation of oxides. Through FT-IR it was noticed the presence of functional groups attributable to the filler nanoparticles.