Préparation et caractérisation des mélanges à base de polycarbonate/acrylonitrile-polybutadiène-styrène (PC/ABS)

Abstract

The present work aimed to study the effect of maleic anhydride–grafted styrene–ethylene/butylene– styrene (SEBS-g-MAH) compatibilizer on different properties of polycarbonate and poly(acrylonitrile– butadiene–styrene) (PC/ABS) blends. For this purpose, blends of PC and ABS at different ratios, without and with concentrations of 1, 3 and 5% of compatibilizer, were prepared by melt compounding in a corotating twin-screw extruder followed by injection molding. The effectiveness of the compatibilizer was investigated by studying the morphological and the mechanical, thermal, and rheological properties of the blends. It was found that the addition of the compatibilizer increases the mechanical properties, complex viscosity, and thermal stability. This effect was noted at a loading of 1 wt% of compatibilizer, where enhanced interactions between the PC and ABS can be seen. In addition, the influence of ABS type and compatibilizer on the thermal and mechanical properties of PC/ABS blends was investigated. For this purpose, blends of PC with two types of ABS, with different rubber content, were prepared at 70 %wt of PC and 30 %wt of ABS, without and with compatibilizer at loadings of 1, 3 and 5 %wt. The effectiveness of those formulations were examined by means of morphological (SEM), thermal (DSC, TGA) and mechanical properties. It was shown that the compatibilizer had in general beneficial effects on the whole properties of PC/ABS blends, and that the optimal amount of compatibilizer depends on the ABS type.