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Rheologica Acta
Erschienen in: Rheologica Acta 5/2012

01.05.2012 | Original Contribution

Stress and neutron scattering measurements on linear polymer melts undergoing steady elongational flow

verfasst von: Ole Hassager, Kell Mortensen, Anders Bach, Kristoffer Almdal, Henrik Koblitz Rasmussen, Wim Pyckhout-Hintzen

Erschienen in: Rheologica Acta | Ausgabe 5/2012

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Abstract

We use small-angle neutron scattering to measure the molecular stretching in polystyrene melts undergoing steady elongational flow at large stretch rates. The radius of gyration of the central segment of a partly deuterated polystyrene molecule is, in the stretching direction, increasing with the steady stretch rate to a power of about 0.25. This value is about half of the exponent observed for the increase in stress value σ, in agreement with Gaussian behavior. Thus, finite chain extensibility does not seem to play an important role in the strongly non-linear extensional stress behavior exhibited by the linear polystyrene melt.
Nächster Artikel Rheo-PIV of a shear-banding wormlike micellar solution under large amplitude oscillatory shear

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Metadaten
Titel
Stress and neutron scattering measurements on linear polymer melts undergoing steady elongational flow
verfasst von
Ole Hassager
Kell Mortensen
Anders Bach
Kristoffer Almdal
Henrik Koblitz Rasmussen
Wim Pyckhout-Hintzen
Publikationsdatum
01.05.2012
Verlag
Springer-Verlag
Erschienen in
Rheologica Acta / Ausgabe 5/2012
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI
https://doi.org/10.1007/s00397-012-0622-1

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