Polycarbonate Nanocomposites via Melt Compounding: The Relation between Compatibility and Rheological Properties

The effect of several types of nano particles on the rheological properties of polycarbonate (PC) was compared. Four polycarbonate nanocomposites containing 5 wt% of layered silica (SiO2), Iron oxide (Fe3O4), Iron oxide (Į-Fe2O3), cupric oxide (CuO) nanoparticles were prepared via melt compounding at 260 œC. Compression molded samples were prepared and the dynamic rheological properties of the nanocomposites were investigated. The incorporation of the nanoparticles increased the storage modulus and consequently decreased the damping factor. In the Cole-Cole plot, PC filled layered silica and Fe2O3 nanoparticles showed more semi-circle pattern comparing to that of other nanocomposites implied more compatibility between PC and layered silica and also Fe2O3 nanofillers. While other nanocomposites showed more deviation from this pattern. Rotational mode in rheological studies showed that at low shear rate the viscosities of nanocomposites are higher than that of pure Polycarbonate. While at higher shear rate the viscosity of filled samples tend to approach the viscosity of pure PC

کلیدواژه ها:

Polycarbonate ، Nanocomposites ، layered silica ، Fe3O4 ، Fe2O3 ، CuO ، Rheological properties ، Dynamic rheometry