Original title: Influence of reactive extrusion process on rheological properties of metallocene polypropylenes
Translated title: Vliv reakčního vytlačování na reologické vlastnosti metalocénových polypropylénů
Authors: Pivokonský, Radek ; Zatloukal, M. ; Filip, Petr ; Tzoganakis, C.
Document type: Papers
Conference/Event: Novel trends in rheology /2./, Zlín (CZ), 2007-08-14 / 2007-07-15
Year: 2007
Language: eng
Abstract: [eng] [cze]
Constitutive equations represent a powerful tool for analysis and description of linear and branched polymer materials (even for polydisperse ones). Predictive/fitting capabilities of three constitutive models (eXtended Pom-Pom, PTT-XPP, and modified Leonov models) were examined using four standard industrial PE materials (two linear and two branched). All the materials were tested in both shear and uniaxial extensional flows (steady and transient). Constitutive equations represent a powerful tool for analysis and description of linear and branched polymer materials (even for polydisperse ones). Predictive/fitting capabilities of three constitutive models (eXtended Pom-Pom, PTT-XPP, and modified Leonov models) were examined using four standard industrial PE materials (two linear and two branched). All the materials were tested in both shear and uniaxial extensional flows (steady and transient). Advantages/disadvantages of the individual models to the individual types of materials are discussed and experimentally documented. Konstituční rovnice představují účinný nástroj pro analýzu a popis lineárních a rozvětvených polymerních materiálů. Jsou porovnány možnosti popisu a predikce tří konstitučních rovnic (XPP, PTT-XPP a modifikovaného Leonovova modelu) při aplikaci na čtyři standartní PE materiály (dva lineární a dva rozvětvené). Testování proběhlo jak ve smykovém tak v elongačním toku. Jsou diskutovány výhody a nevýhody jednotlivých modelů.
Keywords: constitutive equations; elongational flow; polymer melts; shear flow
Project no.: CEZ:AV0Z20600510 (CEP), IAA200600703 (CEP)
Funding provider: GA AV ČR
Host item entry: Novel trends in rheology, ISBN 978-80-7318-591-6

Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0156113

Permalink: http://www.nusl.cz/ntk/nusl-38283


The record appears in these collections:
Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers