Modeling of shear and uniaxial extensional viscosities in very wide deformation rates for linear isotactic polypropylene meltblown grades

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modeling of shear and uniaxial extensional viscosities in very wide deformation rates for linear isotactic polypropylene meltblown grades

Popis výsledku v původním jazyce

In this work, shear and uniaxial extensional viscosity data, experimentally determined at very wide deformation rates for two linear isotactic polypropylene meltblown grades, were used to assess the fitting capability of three different constitutive equations, which utilizes infinite shear viscosity as the material parameter. It was shown that Giesekus model has no capability to describe measured extensional viscosities at high deformation rates. Yao model was found to handle basic trends in both viscosities except of very high deformation rates. It was suggested that modification of slip viscosity function and addition of a termination viscosity could improve the Yao model behavior at very high deformation rates. The recently proposed Generalized Newtonian model was found to have high capability to fit shear and extensional viscosities including the very high deformation rate range. It is believed that obtained results can be used in process modeling for nano-sized polymeric products, where deformation rates can reach extremely high values

Název v anglickém jazyce

Modeling of shear and uniaxial extensional viscosities in very wide deformation rates for linear isotactic polypropylene meltblown grades

Popis výsledku anglicky

In this work, shear and uniaxial extensional viscosity data, experimentally determined at very wide deformation rates for two linear isotactic polypropylene meltblown grades, were used to assess the fitting capability of three different constitutive equations, which utilizes infinite shear viscosity as the material parameter. It was shown that Giesekus model has no capability to describe measured extensional viscosities at high deformation rates. Yao model was found to handle basic trends in both viscosities except of very high deformation rates. It was suggested that modification of slip viscosity function and addition of a termination viscosity could improve the Yao model behavior at very high deformation rates. The recently proposed Generalized Newtonian model was found to have high capability to fit shear and extensional viscosities including the very high deformation rate range. It is believed that obtained results can be used in process modeling for nano-sized polymeric products, where deformation rates can reach extremely high values

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Annual Technical Conference - ANTEC, Conference Proceedings

ISBN

978-1-71382-118-2

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

936-941

Název nakladatele

Society of Plastics Engineers ( SPE )

Místo vydání

Brookfield

Místo konání akce

Online

Datum konání akce

30. 3. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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