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Rheologica Acta
Erschienen in: Rheologica Acta 2/2008

01.03.2008 | Original Contribution

On the burst of branched polymer melts during inflation

verfasst von: Henrik Koblitz Rasmussen, Kaijia Yu

Erschienen in: Rheologica Acta | Ausgabe 2/2008

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Abstract

Two molten low-density polyethylene melts, shaped as plates, have been inflated into a circular cylinder during isothermal conditions. Lowering the inflation rates allow the plates to be inflated into a larger volume of the cylinder before bursting. Numerical simulations of the inflations have been performed, using a time-strain separable constitutive K-BKZ equation based on the potential function from the Doi–Edwards theory. The material parameters in the constitutive model are based on liner viscoelastic and time dependent uniaxial elongational viscosities. The numerical calculations show quantitative agreement with the experiments, including the appearance of the burst, for a wide range of experimental conditions. This strongly suggests that the initiation of the burst in the polymer melts is a hydrodynamic phenomenon.
Vorheriger Artikel Transient elongational viscosities of aqueous polyacrylamide solutions measured with an optical rheometer
Nächster Artikel On the sensitivity of interconversion between relaxation and creep

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Metadaten
Titel
On the burst of branched polymer melts during inflation
verfasst von
Henrik Koblitz Rasmussen
Kaijia Yu
Publikationsdatum
01.03.2008
Verlag
Springer-Verlag
Erschienen in
Rheologica Acta / Ausgabe 2/2008
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI
https://doi.org/10.1007/s00397-007-0222-7

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