Preparation et caracterisation du melange Polycarbonate/Polystyrene-co- acrylonitrile (PC/SAN) effet du compatibilisant sur ses proprietes

Abstract

The mechanical, rheological, and thermal study of the blends of polycarbonate (PC) with polystyrene-acrylonitrile (SAN) with and without a compatibilizer in different proportion. PC/SAN/SEBS-g-MAH Melt blending was carried out in an internal mixer, the effect of blend composition of (PC/SAN) with and without a compatibilizer to been followed by studied; rheological (melt flow index (MFI)), mechanical (tensile strength, elongation at break, impact strength and toughness), and thermal (DSC), and imbedded fiber retraction (IFR) technique. The results reveal that the presence of the compatibilizer a styrene- ethylene butylenesstyrene -block copolymer grafted with maleic anhydride allowed the compatibilization of these polymers and reduce the interfacial tension and decrease the hardness of blend, on the other hand the blend have a rubber behaviour without any modification of chemical structure and The results showed that the addition of SEBS-g-MAH could obviously increase the Izod notched impact strength and the elongation at break and decrease the tensile strength.