Elongational viscosity of narrow molar mass distribution polystyrene

Anders Bach; Kristoffer Almdal; Henrik Koblitz Rasmussen; Ole Hassager

doi:10.1021/ma034279q

Elongational viscosity of narrow molar mass distribution polystyrene

Anders Bach, Kristoffer Almdal, Henrik Koblitz Rasmussen, Ole Hassager

Department of Chemical and Biochemical Engineering

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Transient and steady elongational viscosity has been measured for two narrow molar mass distribution polystyrene melts of molar masses 200 000 and 390 000 by means of a filament stretching rheometer. Total Hencky strains of about five have been obtained. The transient elongational viscosity rises above the linear viscoelastic prediction at intermediate strains, indicating strain hardening. The steady elongational viscosities are monotone decreasing functions of elongation rate. At elongation rates larger than the inverse reptation time, the steady elongational viscosity scales linearly with molar mass at fixed elongation rate.

Original language	English
Journal	Macromolecules
Volume	36
Issue number	14
Pages (from-to)	5174-5179
ISSN	0024-9297
DOIs	https://doi.org/10.1021/ma034279q
Publication status	Published - 2003

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title = "Elongational viscosity of narrow molar mass distribution polystyrene",

abstract = "Transient and steady elongational viscosity has been measured for two narrow molar mass distribution polystyrene melts of molar masses 200 000 and 390 000 by means of a filament stretching rheometer. Total Hencky strains of about five have been obtained. The transient elongational viscosity rises above the linear viscoelastic prediction at intermediate strains, indicating strain hardening. The steady elongational viscosities are monotone decreasing functions of elongation rate. At elongation rates larger than the inverse reptation time, the steady elongational viscosity scales linearly with molar mass at fixed elongation rate.",

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author = "Anders Bach and Kristoffer Almdal and Rasmussen, {Henrik Koblitz} and Ole Hassager",

year = "2003",

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journal = "Macromolecules",

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T1 - Elongational viscosity of narrow molar mass distribution polystyrene

AU - Bach, Anders

AU - Almdal, Kristoffer

AU - Rasmussen, Henrik Koblitz

AU - Hassager, Ole

PY - 2003

Y1 - 2003

N2 - Transient and steady elongational viscosity has been measured for two narrow molar mass distribution polystyrene melts of molar masses 200 000 and 390 000 by means of a filament stretching rheometer. Total Hencky strains of about five have been obtained. The transient elongational viscosity rises above the linear viscoelastic prediction at intermediate strains, indicating strain hardening. The steady elongational viscosities are monotone decreasing functions of elongation rate. At elongation rates larger than the inverse reptation time, the steady elongational viscosity scales linearly with molar mass at fixed elongation rate.

AB - Transient and steady elongational viscosity has been measured for two narrow molar mass distribution polystyrene melts of molar masses 200 000 and 390 000 by means of a filament stretching rheometer. Total Hencky strains of about five have been obtained. The transient elongational viscosity rises above the linear viscoelastic prediction at intermediate strains, indicating strain hardening. The steady elongational viscosities are monotone decreasing functions of elongation rate. At elongation rates larger than the inverse reptation time, the steady elongational viscosity scales linearly with molar mass at fixed elongation rate.

KW - 7-I poly

U2 - 10.1021/ma034279q

DO - 10.1021/ma034279q

M3 - Journal article

VL - 36

SP - 5174

EP - 5179

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 14

ER -