On the non-newtonian viscous behavior of polymer melts in terms of temperature and pressure-dependent hole fraction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F14%3A43871784" target="_blank" >RIV/70883521:28610/14:43871784 - isvavai.cz</a>

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1002/app.40540/abstract;jsessionid=B9DD4558AAE0C712844E91A15E287165.f03t04" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/app.40540/abstract;jsessionid=B9DD4558AAE0C712844E91A15E287165.f03t04</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/app.40540" target="_blank" >10.1002/app.40540</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the non-newtonian viscous behavior of polymer melts in terms of temperature and pressure-dependent hole fraction

Popis výsledku v původním jazyce

A new theoretical non-Newtonian viscosity model is developed by taking the fractional series expansion of Eyring's shearing strain rate. A broad range of experimental rheological data of various polymer melts including polyethylenes, polypropylene, polystyrene, poly (methyl methacrylate), and polycarbonate are fitted well using the proposed model. From the model; zero shear, constant shear-stress and constant shear-rate viscosities are derived as a linear function of viscosity related quantity, Yh, called "thermo-occupancy function" and their coefficients are discussed in detail. The thermo-occupancy function is expressed in terms of temperature and structural vacancies such as hole fraction computed from the Simha-Somcynsky Hole Theory (SS). In addition, the derivative of the logarithm of viscosities with respect to the hole fraction, named as viscoholibility, is observed decreases with the increasing hole fraction.

Název v anglickém jazyce

On the non-newtonian viscous behavior of polymer melts in terms of temperature and pressure-dependent hole fraction

Popis výsledku anglicky

A new theoretical non-Newtonian viscosity model is developed by taking the fractional series expansion of Eyring's shearing strain rate. A broad range of experimental rheological data of various polymer melts including polyethylenes, polypropylene, polystyrene, poly (methyl methacrylate), and polycarbonate are fitted well using the proposed model. From the model; zero shear, constant shear-stress and constant shear-rate viscosities are derived as a linear function of viscosity related quantity, Yh, called "thermo-occupancy function" and their coefficients are discussed in detail. The thermo-occupancy function is expressed in terms of temperature and structural vacancies such as hole fraction computed from the Simha-Somcynsky Hole Theory (SS). In addition, the derivative of the logarithm of viscosities with respect to the hole fraction, named as viscoholibility, is observed decreases with the increasing hole fraction.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

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Svazek periodika

131

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

"@@@###"

Kód UT WoS článku

000336456400071

EID výsledku v databázi Scopus

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