Effect of Viscoelastic Stress State at Die Exit on Extrusion Film Casting Process: Theoretical Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F15%3A43873230" target="_blank" >RIV/70883521:28110/15:43873230 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4918888" target="_blank" >http://dx.doi.org/10.1063/1.4918888</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4918888" target="_blank" >10.1063/1.4918888</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Viscoelastic Stress State at Die Exit on Extrusion Film Casting Process: Theoretical Study

Popis výsledku v původním jazyce

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 inthe 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 andfirst 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 th

Název v anglickém jazyce

Effect of Viscoelastic Stress State at Die Exit on Extrusion Film Casting Process: Theoretical Study

Popis výsledku anglicky

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 inthe 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 andfirst 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 th

Druh

D - Stať ve sborníku

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

AIP Conference Proceedings

ISBN

978-0-7354-1306-1

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

12

Strana od-do

0300131-03001312

Název nakladatele

American Institute of Physics

Místo vydání

Melville

Místo konání akce

Zlín

Datum konání akce

28. 7. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000363246400018