Thermal and Rheological Properties of Polypropylene/Organoclay/Poly(ethylene-co-octene) Nanocomposites*

Poly(ethylene-co-octene) (PEOc) is added to polypropylene/organocla\textbf{y(}organic modified montmorillonite-OMMT) nanocomposites which are prepared by a co-rotating twin-screw extruder to improve the properties of these materials. These ternary materials are investigated in details with the combination of XRD, TGA and rheology measurements. The onset and 5{\%} loss temperatures have increased with clay content increasing and reached to a plateau when clay composition is 2{\%} or higher. The degradation temperatures of the ternary nanocomposites are higher than binary nanocomposites. Storage modulus of these two systems show a pseudo-solid like behavior in low frequency region when clay content is 2{\%} or higher. But ternary nanocomposite is more stable and relaxation slower than binary composites. All results indicated that PEOc plays an important role for thermal stability and structure stability of these nanocomposites.