PET/R-PP/PC blends by two-stage reactive extrusion: Effect of polypropylene reactively functionalized with an oxazoline group on morphology and mechanical properties
R. Jeziorska, PET/R-PP/PC blends by two-stage reactive extrusion: Effect of polypropylene reactively functionalized with an oxazoline group on morphology and mechanical properties, MACRO SYMP, 170, 2001, pp. 21-28
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.