Coextrusion of polymers: interfacial instabilities : Rheology and base flow modeling

Rheology and base flow modeling
Coextrusion of polymers: interfacial instabilities

Author : Rudy VALETTE

Publication date: January 10, 2010 | Lire en français

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2. Rheology and base flow modeling

2.1 Rheological properties of polymers

Due to their macromolecular structure, polymers in the molten state exhibit viscoelastic behavior (see [AM 3 630] Nonlinear viscoelasticity of molten polymers). In particular, in a stationary shear flow of direction x in the (x, y) plane where the velocity field $\vec{ν}$ ...

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