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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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as a article
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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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1001.2619v1
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