PET/R-PP/PC blends by two-stage reactive extrusion: Effect of polypropylene reactively functionalized with an oxazoline group on morphology and mechanical properties

A series of PET/R-PP/PC blends was studied in a chemical modification invol ving reactive extrusion with a ricinyl-2-oxazoline maleinate. The interfaci al reaction between blend components were studied by the differential scann ing calorimetry (DSC) and the scanning electron microscopy (SEM). The stati c tensile and flexural properties, and impact resistance response of the bl ends were tested. The phase morphology of the blends was of interpenetratin g network (IPN) type according to SEM results. The blends offer excellent m echanical properties and improved impact strength as an effect of chemical reactions on reactive extrusion, even if PET waste and low PC contents (bel ow 20%) have been used.