Morphology and thermo mechanical properties of pp/ps nanocomposites

Abstract

The immiscible polypropylene (PP)/polystyrene (PS) blends and theirs organoclay 10A (Cloisite10A) nanocomposites with different contents were prepared via melt blending into a co-rotating twin screw extruder and the test samples were molded by injection molding. The 10A is an anisotropic layered silicate and the effect PP/PS ratio, 10A different content on melt and crystallization enthalpy were determined by DSC. The T g , storage modulus (E’), and tanδ measurements were obtained by DMA. The domains reduction of PS in the PP with addition 10A was investigated by Scanning Electronic Microscope (SEM). There is a decrease in PS particles size in PP/PS blends containing 10A. The crystallinity degree of PP seems to reduction with the addition of PS phase and 10A. The E’ of the PP/PS 90/10/0 blends showed slightly changes between Neat PP and PP/PS/10A nonetheless the nanocomposites 3 and 5 %wt had a small rise in the storage modulus between −50 and 0 °C.