INFLUENCE OF VISCOSITY RATIO ON THE IMPACT PROPERTIES OF PS/HDPE BLENDS PREPARED BY EXTRUSION AND INJECTION MOLDING

摘要

Blends of PS/HDPE were prepared by ribbon extrusion and injection molding.Three different PS and HDPE were used in order to modify the viscosity ratio (p).The impact properties and morphological study of test specimens are presented.The results indicate a different effect of the viscosity ratio depending of the processing method on the morphology and impact resistance.In general,it was observed better impact resistance in samples prepared by ribbon extrusion than the samples prepared by injection molding.