Constriction flows of monodisperse linear entangled polymers: Multiscale modeling and flow visualization
Contribuinte(s) |
Arthur B. Metzner |
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Data(s) |
01/01/2005
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Resumo |
We explore both the rheology and complex flow behavior of monodisperse polymer melts. Adequate quantities of monodisperse polymer were synthesized in order that both the materials rheology and microprocessing behavior could be established. In parallel, we employ a molecular theory for the polymer rheology that is suitable for comparison with experimental rheometric data and numerical simulation for microprocessing flows. The model is capable of matching both shear and extensional data with minimal parameter fitting. Experimental data for the processing behavior of monodisperse polymers are presented for the first time as flow birefringence and pressure difference data obtained using a Multipass Rheometer with an 11:1 constriction entry and exit flow. Matching of experimental processing data was obtained using the constitutive equation with the Lagrangian numerical solver, FLOWSOLVE. The results show the direct coupling between molecular constitutive response and macroscopic processing behavior, and differentiate flow effects that arise separately from orientation and stretch. (c) 2005 The Society of Rheology. |
Identificador | |
Idioma(s) |
eng |
Publicador |
American Institute of Physics |
Palavras-Chave | #Mechanics #Convective Constraint Release #Simple Constitutive Equation #Pom-pom Model #Molecular Theory #Numerical-simulation #Multipass Rheometer #Microscopic Theory #Chain Stretch #Melts #Dynamics #C1 #290103 Food Processing #670107 Grain mill products, starch and starch products (incl. sugar, bakery products) |
Tipo |
Journal Article |