Modelling of nonlinear viscoelastic polymeric materials at their large periodic deformation

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of nonlinear viscoelastic polymeric materials at their large periodic deformation

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Modelling of nonlinear viscoelastic polymeric materials at their large periodic deformation

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA17-26808S" target="_blank" >GA17-26808S: Charakterizace polymerních tavenin a roztoků pomocí konstitutivních modelů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Epitoanyag: journal of silicate based and composite materials

ISSN

0013-970X

e-ISSN

—

Svazek periodika

71

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

3

Strana od-do

2-4

Kód UT WoS článku

000500452800001

EID výsledku v databázi Scopus

—