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Influence of coextrusion die channel height on interfacial instability of low density polyethylene melt flow

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dc.title Influence of coextrusion die channel height on interfacial instability of low density polyethylene melt flow en
dc.contributor.author Martyn, Mike T.
dc.contributor.author Coates, Phil D.
dc.contributor.author Zatloukal, Martin
dc.relation.ispartof Plastics, Rubber and Composites: Macromolecular Engineering
dc.identifier.issn 1465-8011 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2014
utb.relation.volume 43
utb.relation.issue 1
dc.citation.spage 25
dc.citation.epage 31
dc.type article
dc.language.iso en
dc.publisher Maney Publishing en
dc.identifier.doi 10.1179/1743289813Y.0000000065
dc.relation.uri https://www.tandfonline.com/doi/full/10.1179/1743289813Y.0000000065
dc.subject Coextrusion en
dc.subject Flow visualization en
dc.subject Interfacial instabilities en
dc.subject Modellin en
dc.subject Polyethylene en
dc.description.abstract The effect of side stream channel height on flow stability in 30u coextrusion geometries was investigated. The studies were conducted on a Dow LD150R low density polyethylene melt using a single extruder to feed a flow cell in which the delivered melt stream was split before, and rejoined after, a divider plate in a slit die. Wave type interfacial instability occurred at critical stream thickness ratios. Reducing the side stream channel height broadened the layer ratio operating range before the onset of interfacial instability, therefore improving process stability. Stress fields were quantified and used to validate principal stress differences of numerically modelled flow. Stress field features promoting interfacial instability in each of the die geometries were identified. Interfacial instability resulted when the stress gradient across the interface was asymmetric and accompanied by a non-monotonic decay in the stress along the interface from its inception. © Institute of Materials, Minerals and Mining 2014. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1003694
utb.identifier.obdid 43871761
utb.identifier.scopus 2-s2.0-84894589765
utb.identifier.wok 000337125300004
utb.identifier.coden PRUCF
utb.source j-scopus
dc.date.accessioned 2014-03-13T16:50:51Z
dc.date.available 2014-03-13T16:50:51Z
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Zatloukal, Martin
utb.fulltext.affiliation M. T. Martyn*1 , P. D. Coates1 and M. Zatloukal2 1 IRC in Polymer Science & Technology, School of Engineering, Design & Technology, University of Bradford, Bradford BD7 1DP, UK 2 Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Nad Ovcirnou 3685, Zlin 760 01, Czech Republic *Corresponding author, email m.t.martyn@bradford.ac.uk
utb.fulltext.dates -
utb.fulltext.sponsorship The authors wish to acknowledge the IRC in Polymer Engineering, University of Bradford, Grant Agency of the Czech Republic (grant no. 103/09/2066) and Operational Programme Research and Development for Innovations cofunded by the European Regional Development Fund and national budget of Czech Republic, within the framework of project Centre of Polymer Systems (reg. no. CZ.1?05/2?1?00/03?0111) for the financial support.
utb.fulltext.faculty University Institute
utb.fulltext.ou Centre of Polymer Systems
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