Rheological characterization of long-chain branched polyethylenes and comparison with classical analytical methods

Florian J. Stadler; Christian Piel; Walter Kaminsky; Helmut Münstedt

doi:10.1002/masy.200690057

Rheological characterization of long-chain branched polyethylenes and comparison with classical analytical methods

Florian J. Stadler, Christian Piel, Walter Kaminsky, Helmut Münstedt^*

^*Corresponding author for this work

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

61 Scopus citations

Abstract

Long-chain branched polyethylenes are still of great interest today. In some cases their characterization is not an easy task with classical analytic methods (GPC-MALLS and NMR) because of the limited sensitivity at low concentrations of long-chain branches. Rheological methods make a valuable contribution to the characterization due to their high sensitivity with respect to long-chain branches. Using rheology it was possible to get an insight into the influence of different comonomers and comonomer concentrations on the long-chain branch incorporation in LLDPE. A variation of polymerization parameters such as polymerization pressure was found to influence the rheological behavior. From these findings some conclusions with respect to the molecular structure could be drawn.

Original language	English
Pages (from-to)	209-218
Number of pages	10
Journal	Macromolecular Symposia
Volume	236
DOIs	https://doi.org/10.1002/masy.200690057
State	Published - 2006
Externally published	Yes

Keywords

GPC-MALLS
Long-chain branch
Polyethylene
Shear rheology
Zero shear-rate viscosity

ASJC Scopus subject areas

Condensed Matter Physics
Organic Chemistry
Polymers and Plastics
Materials Chemistry

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title = "Rheological characterization of long-chain branched polyethylenes and comparison with classical analytical methods",

abstract = "Long-chain branched polyethylenes are still of great interest today. In some cases their characterization is not an easy task with classical analytic methods (GPC-MALLS and NMR) because of the limited sensitivity at low concentrations of long-chain branches. Rheological methods make a valuable contribution to the characterization due to their high sensitivity with respect to long-chain branches. Using rheology it was possible to get an insight into the influence of different comonomers and comonomer concentrations on the long-chain branch incorporation in LLDPE. A variation of polymerization parameters such as polymerization pressure was found to influence the rheological behavior. From these findings some conclusions with respect to the molecular structure could be drawn.",

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volume = "236",

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journal = "Macromolecular Symposia",

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T1 - Rheological characterization of long-chain branched polyethylenes and comparison with classical analytical methods

AU - Stadler, Florian J.

AU - Piel, Christian

AU - Kaminsky, Walter

AU - Münstedt, Helmut

PY - 2006

Y1 - 2006

N2 - Long-chain branched polyethylenes are still of great interest today. In some cases their characterization is not an easy task with classical analytic methods (GPC-MALLS and NMR) because of the limited sensitivity at low concentrations of long-chain branches. Rheological methods make a valuable contribution to the characterization due to their high sensitivity with respect to long-chain branches. Using rheology it was possible to get an insight into the influence of different comonomers and comonomer concentrations on the long-chain branch incorporation in LLDPE. A variation of polymerization parameters such as polymerization pressure was found to influence the rheological behavior. From these findings some conclusions with respect to the molecular structure could be drawn.

AB - Long-chain branched polyethylenes are still of great interest today. In some cases their characterization is not an easy task with classical analytic methods (GPC-MALLS and NMR) because of the limited sensitivity at low concentrations of long-chain branches. Rheological methods make a valuable contribution to the characterization due to their high sensitivity with respect to long-chain branches. Using rheology it was possible to get an insight into the influence of different comonomers and comonomer concentrations on the long-chain branch incorporation in LLDPE. A variation of polymerization parameters such as polymerization pressure was found to influence the rheological behavior. From these findings some conclusions with respect to the molecular structure could be drawn.

KW - GPC-MALLS

KW - Long-chain branch

KW - Polyethylene

KW - Shear rheology

KW - Zero shear-rate viscosity

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DO - 10.1002/masy.200690057

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JO - Macromolecular Symposia

JF - Macromolecular Symposia

ER -

Rheological characterization of long-chain branched polyethylenes and comparison with classical analytical methods

Abstract

Keywords

ASJC Scopus subject areas

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