Temperature-dependent instabilities in the capillary flow of a metallocene linear low-density polyethylene melt

José Pérez-González; Lourdes De Vargas; Vladimír Pavlínek; Berenika Hausnerová; Petr Sáha

doi:10.1122/1.551095

Temperature-dependent instabilities in the capillary flow of a metallocene linear low-density polyethylene melt

José Pérez-González, Lourdes De Vargas, Vladimír Pavlínek, Berenika Hausnerová, Petr Sáha

Escuela Superior de Física y Matemáticas (ESFM)

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

An experimental study was carried out to know the rheological behavior of a commercial mLLDPE and to examine the effect of temperature on the onset of the unstable oscillating flow in linear polyethylenes. Rheological measurements were performed on the commercial metallocene LLDPE EXACT 3132 at temperatures between 110 and 190°C. Critical shear stress for the onset of unstable flow was determined as a function of temperature. It was observed that flow-induced crystallization and extrudate quality are dependent on the contraction ratio at 110°C. Extrudates free of surface distortions were obtained at T<116°C. In addition, a decrease in the activation energy for flow was found at temperatures below the critical one.

Original language	English
Pages (from-to)	441-451
Number of pages	11
Journal	Journal of Rheology
Volume	44
Issue number	3
DOIs	https://doi.org/10.1122/1.551095
State	Published - 2000

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abstract = "An experimental study was carried out to know the rheological behavior of a commercial mLLDPE and to examine the effect of temperature on the onset of the unstable oscillating flow in linear polyethylenes. Rheological measurements were performed on the commercial metallocene LLDPE EXACT 3132 at temperatures between 110 and 190°C. Critical shear stress for the onset of unstable flow was determined as a function of temperature. It was observed that flow-induced crystallization and extrudate quality are dependent on the contraction ratio at 110°C. Extrudates free of surface distortions were obtained at T<116°C. In addition, a decrease in the activation energy for flow was found at temperatures below the critical one.",

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T1 - Temperature-dependent instabilities in the capillary flow of a metallocene linear low-density polyethylene melt

AU - Pérez-González, José

AU - De Vargas, Lourdes

AU - Pavlínek, Vladimír

AU - Hausnerová, Berenika

AU - Sáha, Petr

PY - 2000

Y1 - 2000

N2 - An experimental study was carried out to know the rheological behavior of a commercial mLLDPE and to examine the effect of temperature on the onset of the unstable oscillating flow in linear polyethylenes. Rheological measurements were performed on the commercial metallocene LLDPE EXACT 3132 at temperatures between 110 and 190°C. Critical shear stress for the onset of unstable flow was determined as a function of temperature. It was observed that flow-induced crystallization and extrudate quality are dependent on the contraction ratio at 110°C. Extrudates free of surface distortions were obtained at T<116°C. In addition, a decrease in the activation energy for flow was found at temperatures below the critical one.

AB - An experimental study was carried out to know the rheological behavior of a commercial mLLDPE and to examine the effect of temperature on the onset of the unstable oscillating flow in linear polyethylenes. Rheological measurements were performed on the commercial metallocene LLDPE EXACT 3132 at temperatures between 110 and 190°C. Critical shear stress for the onset of unstable flow was determined as a function of temperature. It was observed that flow-induced crystallization and extrudate quality are dependent on the contraction ratio at 110°C. Extrudates free of surface distortions were obtained at T<116°C. In addition, a decrease in the activation energy for flow was found at temperatures below the critical one.

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DO - 10.1122/1.551095

M3 - Artículo

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VL - 44

SP - 441

EP - 451

JO - Journal of Rheology

JF - Journal of Rheology

IS - 3

ER -

Temperature-dependent instabilities in the capillary flow of a metallocene linear low-density polyethylene melt

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