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Effect of die exit geometry on internal die drool phenomenon during linear HDPE melt extrusion

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dc.title Effect of die exit geometry on internal die drool phenomenon during linear HDPE melt extrusion en
dc.contributor.author Musil, Jan
dc.contributor.author Zatloukal, Martin
dc.relation.ispartof International Journal of Heat and Mass Transfer
dc.identifier.issn 0017-9310 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2013
utb.relation.volume 56
utb.relation.issue 1-2
dc.citation.spage 667
dc.citation.epage 673
dc.type article
dc.language.iso en
dc.publisher Pergamon en
dc.identifier.doi 10.1016/j.ijheatmasstransfer.2012.09.059
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0017931012007612
dc.subject Die buildup en
dc.subject Die drool phenomenon en
dc.subject Extrusion en
dc.subject Flow induced molecular weight fractionation en
dc.subject Flow instabilities en
dc.subject Mass transfer en
dc.subject Polymer melt en
dc.subject Rheology en
dc.description.abstract In this work, the effect of die exit design on the internal die drool phenomenon occurring during extrusion of HDPE has been experimentally investigated. It has been revealed, that firstly, the effect of flared length and die exit angle on the internal die drool intensity during extrusion of HDPE has non-monotonic character and secondly, flared dies are more stabilizing in comparison with chamfered dies. It has been suggested that suppression mechanism of the internal die drool phenomenon through die exit modification can be understood through the balance between the melt pressure/normal stresses at the die exit, adhesion at metal wall/flowing melt interface and extensional stress induced by the extrudate draw off, which can lead to flow situation at which low molecular weight species are effectively removed from the die exit region by the moving extrudate and only small portion of them remains at the die exit face. © 2012 Elsevier Ltd. All rights reserved. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1003040
utb.identifier.obdid 43869816
utb.identifier.scopus 2-s2.0-84867816963
utb.identifier.wok 000312625200061
utb.identifier.coden IJHMA
utb.source j-scopus
dc.date.accessioned 2012-12-06T09:22:52Z
dc.date.available 2012-12-06T09:22:52Z
utb.contributor.internalauthor Musil, Jan
utb.contributor.internalauthor Zatloukal, Martin
utb.fulltext.affiliation Jan Musil, Martin Zatloukal * Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Nad Ovcirnou 3685, 760 01 Zlin, Czech Republic Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, TGM 275, 762 72 Zlin, Czech Republic *Corresponding author at: Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, TGM 275, 762 72 Zlin, Czech Republic. E-mail addresses: j2musil@seznam.cz (J. Musil), mzatloukal@ft.utb.cz (M. Zatloukal).
utb.fulltext.dates Received 26 July 2012 Accepted 26 September 2012 Available online 27 October 2012
utb.fulltext.sponsorship The authors wish to acknowledge Grant Agency of the Czech Republic (Grant No. 103/09/2066) and Operational Program Research and Development for Innovations co-funded by the European Regional Development Fund (ERDF) and national budget of Czech Republic, within the framework of project Centre of Polymer Systems (reg. number: CZ.1.05/2.1.00/03.0111) for the financial support.
utb.fulltext.projects GAČR 103/09/2066
utb.fulltext.projects CZ.1.05/2.1.00/03.0111
utb.fulltext.faculty University Institute
utb.fulltext.faculty Faculty of Technology
utb.fulltext.ou Centre of Polymer Systems
utb.fulltext.ou Polymer Centre
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