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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F20%3A63527072" target="_blank" >RIV/70883521:28110/20:63527072 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Modeling of shear and uniaxial extensional viscosities in very wide deformation rates for linear isotactic polypropylene meltblown grades
Original language description
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
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Annual Technical Conference - ANTEC, Conference Proceedings
ISBN
978-1-71382-118-2
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
936-941
Publisher name
Society of Plastics Engineers ( SPE )
Place of publication
Brookfield
Event location
Online
Event date
Mar 30, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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