volume 34, issue 19, P1441-1449 1994
DOI: 10.1002/pen.760341902
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Abstract: The capillary die flow of high density and linear low density polyethylenes is simulated tinder slip conditions to investigate the origin of sharkskin melt fi-acture. As suggested in the literature, it is shown that sharkskin originates at the exit of the die and is due to the acceleration (high stretching rate) of the melt as it exits the die. It is also shown that both adhesion and slip promoters