Title: How to obtain the elongational viscosity of dilute polymer solutions?
Authors: Lindner, A ×
Vermant, Jan
Bonn, D #
Issue Date: Mar-2003
Publisher: Elsevier science bv
Series Title: Physica a-statistical mechanics and its applications vol:319 pages:125-133
Abstract: Measurement of the resistance to a stretching motion, the so-called elongational viscosity eta(c), has proven to be difficult for dilute polymer solutions, although it is important for a large number of applications. We attempt to deduce eta(c), of dilute solutions of flexible polymers in two different ways. First, eta(c) can be inferred from measurements of the shear viscosity eta and the first normal stress difference N-1, invoking an appropriate constitutive equation. Second, it is measured in the opposing jet elongational viscometer. Although the results of the latter method have been much debated they agree reasonably well with those from the first method. The combination of the two methods thus allows to obtain the correct order of magnitude of eta(c). (C) 2002 Elsevier Science B.V. All rights reserved.
ISSN: 0378-4371
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Soft Matter, Rheology and Technology Section
× corresponding author
# (joint) last author

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