Modelling of nonlinear viscoelastic polymeric materials at their large periodic deformation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F19%3A00499215" target="_blank" >RIV/67985874:_____/19:00499215 - isvavai.cz</a>

Result on the web

<a href="http://hdl.handle.net/11104/0294954" target="_blank" >http://hdl.handle.net/11104/0294954</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14382/epitoanyag-jsbcm.2019.1" target="_blank" >10.14382/epitoanyag-jsbcm.2019.1</a>

Result language

angličtina

Original language name

Modelling of nonlinear viscoelastic polymeric materials at their large periodic deformation

Original language description

Analyzing the behavior of flows of polymers solutions and melts in the area of non-linear viscoelasticity allows to estimate more precisely the adequacy of the rheological model and tondescribe the material structure in more detail. Today a lot of models describe non-linear properties of polymeric materials rather accurately. However, the formulation of a uniform rheological modelnremains open. Therefore this work considers the modified Vinogradov-Pokrovsky rheological model which formed the basis for numerical calculations for periodic deformation of shear flowsnof polymeric liquids with a large amplitude. The non-linear viscoelastic properties shown in the course of the research of behavior of polymeric material at large deformations were studied bynmeans of the immediate analysis of time dependence of shear stresses which were calculated at various amplitudes. It was stated that when increasing the amplitude of deformation the responsenstops being the exact harmonica, and a “step” on the left-hand front appears. It manifests the nonlinear response of a sample. The work compares obtained theoretical dependences and thenexperimental data for 5% mass solutions of the polyethylene oxide in dimethylsulfoxide which was studied at harmonic deformations with the large amplitude reaching 40 relative units. Thesendependences were measured at 35°C and the frequency of 0.2 Hz. Despite its simplicity, the modified Vinogradov-Pokrovsky rheological model shows good compliance with the experimentalndata. The results show that the chosen model adequately describes behavior of polymeric materials at large periodic deformations. Therefore this model may be applied for modeling morencomplex flows of fluid polymeric environments.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GA17-26808S" target="_blank" >GA17-26808S: Characterization of polymer melts and solutions by means of constitutive equations</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Epitoanyag: journal of silicate based and composite materials

ISSN

0013-970X

e-ISSN

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Volume of the periodical

71

Issue of the periodical within the volume

1

Country of publishing house

HU - HUNGARY

Number of pages

3

Pages from-to

2-4

UT code for WoS article

000500452800001

EID of the result in the Scopus database

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