Comparative investigations of surface instabilities ("sharkskin") of a linear and a long-chain branched polyethylene release_qohv6ccaorbwpjzio3pur3egiu

by Teodor I. Burghelea, Hans J. Griess, Helmut Muenstedt

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2010  

Abstract

An experimental study of the physical origin and the mechanisms of the sharkskin instability is presented. Extrusion flows through a slit die are studied for two materials: a linear low density polyethylene (LLDPE) and a low density polyethylene (LDPE). By combining laser-Doppler velocimetry (LDV) with rheological measurements in both uniaxial extension and shear, the distributions of tensile and shear stresses in extrusion flows are measured for both materials.
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Date   2010-01-15
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arXiv  1001.2619v1
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