Open AccessEvaluation of Die Swell Behavior During Capillary Extrusion of Poly(lactic acid)/ High density polyethylene Blend Melts
Author(s) -
Fadi Alzarzouri,
Fawaz Déri
Publication year - 2020
Publication title -
technium
Language(s) - English
Resource type - Journals
ISSN - 2668-778X
DOI - 10.47577/technium.v2i3.387
Subject(s) - high density polyethylene , die swell , materials science , shear rate , extrusion , capillary action , composite material , polyethylene , swell , shear stress , rheometer , shear (geology) , die (integrated circuit) , rheology , thermodynamics , physics , nanotechnology
Poly lactic acid (PLA) and High density polyethylene (HDPE) have been blended in a Brabender plastograph in the molten state. The melt die swell of the blends has been studied by using a capillary rheometer. Effects of the capillary dimensions, shear stress, shear rate, temperature and blending ratio on die swell of PLA/HDPE blend melts were investigated. The results showed that die swell ratio decreased with increasing of capillary length and temperature while it increased with increasing of shear stress, shear rate and capillary diameter. It was also found that the plots of die swell versus blending ratio go through a maximum for blending ratio PLA/HDPE (60/40).