The effect of rotor speed on EVA/PBAT blend using Twin screw extruder and foamability of EVA/PBAT blend

Abstract This research is aimed to study EVA/PBAT blends with various EVA and PBAT composition and screw speeds. At PBAT contents 40% EVA and PBAT present as co-continuous phase morphology. The morphology did not change due to screw speed. At PBAT 50% by weight, co-continuous phase occurred and the morphology becomes dispersed as screw speed was increased to 80 and 100 rpm. Extrudates obtained from twin screw extruder were tensioned under tensile force. The results show elastomeric behavior of the blends. Elongation at break was higher than 800 % strain and exhibited strain hardening characteristic. Secant modulus of EVA/PBAT blends was increased with PBAT contents due to the high modulus of semi-crystalline PBAT. Content of EVA controls elongation ability of the blends. EVA/PBAT blends with the content of 40/60, 50/50, 60/40, 70/30 and 80/20 were form for foam and found that all composition could be able to be foam. This could be further studied and carried on for shoes sole application.