NDLI: Dynamics and rheology of the morphology of immiscible polymer blends

Content Provider	Springer Nature Link
Author	Roths, Tobias Friedrich, Christian Marth, Michael Honerkamp, Josef
Copyright Year	2002
Abstract	The material properties of heterogeneous polymer blends are crucially influenced by their morphology, i.e., by the spatial structure of the blend components and by the specific configuration of the interfaces separating the phases. Hence, in order to understand the behavior of experimentally obtained morphologies, one is interested in modeling the relevant dynamics of the morphology subject to external flow. Thus one can study, e.g., through the interfacial stress tensor the rheological properties due to the interfaces. The balance equations used for that purpose are based on a Cahn-Hilliard equation for the local concentration, the continuity equation, and a modified Navier-Stokes equation for the local velocity. The essential material and processing parameters such as surface tension, viscosity and volume fraction of both polymers, and imposed shear rate are taken into consideration as model coefficients. By regarding hydrodynamic interaction, which is proved to be important in case of immiscible blends, the interfacial relaxation is described properly. Simulations in both three and two dimensions agree at least qualitatively with experimental results concerning droplet deformation, droplet coalescence, and interfacial rheological properties of the blend.
Starting Page	211
Ending Page	222
Page Count	12
File Format	PDF
ISSN	00354511
Journal	Rheologica Acta
Volume Number	41
Issue Number	3
e-ISSN	14351528
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-04-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Materials Science

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