Rheological Properties of Polypropylene/Nylon66 /TiO Blend nanocomposites

Nanocomposites based on polypropylene (PP), polyamide 66 (nylon 66) and PP/nylon 66 immiscible blends containing 5wt% TiO2 nanoparticles were prepared via melt compounding. The influences of TiO2 on the rheology of nanocomposites and blend nanocomposites were investigated. Scanning electron microscopy results revealed the size of inclusion phase was smaller in PP/PA 66/TiO2 75/25/5 comparing to the PP/PA 66/TiO2 25/75/5. A co-continuos phase was observed at 50/50 composition. Melt dynamic rheology showed that the moduli of the PP increased with incorporation of TiO2 nanoparticles at the moderate frequencies, while this effect was reverse in PA 66 nanocomposite. Several rheological and rheo-morphological models were used for prediction of rheological parameters. The well￾known models for rheology of suspensions proposed by Einstein, Roscope and Eilers-van Dijck were successful for prediction of viscosity of PA nanocomposite. Palierne model was fitted to the experimental values especially for the: PP/PA 66/ TiO2 25/75/5 blend nanocomposite

کلیدواژه ها:

Polypropylene ، Nylon 66 ، Blend ، Nanocomposite ، Nanoparticle ، Rheology