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Effect of viscoelastic stress state at die exit on extrusion film casting process: Theoretical study

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dc.title Effect of viscoelastic stress state at die exit on extrusion film casting process: Theoretical study en
dc.contributor.author Barbořík, Tomáš
dc.contributor.author Zatloukal, Martin
dc.relation.ispartof Novel Trends In Rheology VI
dc.identifier.issn 0094-243X OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.identifier.isbn 978-0-7354-1306-1
dc.date.issued 2015
utb.relation.volume 1662
dc.event.title International Conference on Novel Trends in Rheology VI
dc.event.location Zlín
utb.event.state-en Czech Republic
utb.event.state-cs Česká republika
dc.event.sdate 2015-07-28
dc.event.edate 2015-07-29
dc.type conferenceObject
dc.language.iso en
dc.publisher American Institute of Physics (AIP)
dc.identifier.doi 10.1063/1.4918888
dc.relation.uri http://scitation.aip.org/content/aip/journal/jap/117/3/10.1063/1.4905616
dc.description.abstract In this work, viscoelastic, isothermal extrusion film casting modeling utilizing 1D membrane model and modified Leonov model was performed in order to understand the role of viscoelastic stress state at the die exit on the polymer melt film stretching in the post die area. Experimental data for LDPE and theoretical predictions based on the eXtended Pom-Pom (XPP) model taken from the open literature were used for the validation purposes. It was found that predicting capabilities of 1D membrane model utilizing XPP and modified Leonov model are comparable for the given processing conditions and material. Consequent theoretical parametric study revealed that increase in the viscoelastic stress state at the die exit, characterized as the ratio of second and first normal stress differences, -N-2/N-1, leads to increase in neck-in phenomenon. This suggests that specific attention should be paid to optimization of the extrusion die design in order to stabilize polymer melt film stretching in the post die area. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1005744
utb.identifier.obdid 43873665
utb.identifier.scopus 2-s2.0-84984578693
utb.identifier.wok 000363246400018
utb.source d-wok
dc.date.accessioned 2015-12-03T09:30:52Z
dc.date.available 2015-12-03T09:30:52Z
dc.rights.access openAccess
utb.contributor.internalauthor Barbořík, Tomáš
utb.contributor.internalauthor Zatloukal, Martin
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