Stabilization of Polypropylene Nanocomposites by Dendritic Polyglycidol Modified Nano-Filler

Abstract

The thermoxidative stability of polypropylene (PP) nanocomposites was improved by introducing dendritic polymer to surfaces of SiO₂ nanoparticles through stepwise anionic ring-opening polymerization of glycidol. The introduction of surface polyglycidol (PGL) was confirmed and quantified by infrared spectroscopy and thermogravimetric analysis. The influence of the PGL generation on the lifetime of PP/SiO₂ nanocomposites was examined by chemiluminescence analyzer in terms of the oxidation induction time at 180°C. It was found that the dendritic structure of PGL led to remarkable enhancement of the induction time, which likely arose from an encapsulation of a stabilizer in the interior of the dendritic structure of PGL.