Collis, M.W., Lele, A.K., Mackley, M.R., Graham, R.S., Groves, D.J., Likhtman, A.E., Nicholson, T.M., Harlen, O.G., McLeish, T.C.B., Hutchings, L.R., Fernyhough, C.M. and Young, R.N. (2005) Constriction flows of monodisperse linear entangled polymers: Multiscale modeling and flow visualization. Journal of Rheology, 49 (2). pp. 501-522. ISSN 0148-6055Full text available as:
Available under License : See the attached licence file.
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 shearand 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.
|Copyright, Publisher and Additional Information:||© 2005 by The Society of Rheology, Inc. Reproduced with permission of the copyright holder.|
|Academic Units:||The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds)
The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield)
The University of Leeds > University of Leeds Research Centres and Institutes > Interdisciplinary Research Centre in Polymer Science and Technology (Leeds)
The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds)
|Depositing User:||Repository Officer|
|Date Deposited:||14 Aug 2006|
|Last Modified:||08 Feb 2013 17:02|
|Publisher:||American Institute of Physics|
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