Computation of the Linear Viscoelastic Relaxation Spectrum from Capillary Viscozity Data

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

Computation of the Linear Viscoelastic Relaxation Spectrum from Capillary Viscozity Data

Popis výsledku v původním jazyce

A simple method is presented for the estimation of the Linear viscoelastic relaxation spectrum from capillary viscosity data. For that purpose, a modified Leonov model is employed and the spectra and model parameters are estimated through nonlinear regression using measured steady shear viscosity data and extensional viscosity data calculated from Cogswell's method. Using the proposed methodology, the spectra of several resins were estimated and they were used in a Maxwell model to predict the linear viscoelastic properties of these resins. The predicted properties (storage and loss moduli and complex viscosity) were found to be in very good agreement with data from oscillatory shear measurements, thus supporting the validity of the estimated relaxation spectra.

Název v anglickém jazyce

Computation of the Linear Viscoelastic Relaxation Spectrum from Capillary Viscozity Data

Popis výsledku anglicky

A simple method is presented for the estimation of the Linear viscoelastic relaxation spectrum from capillary viscosity data. For that purpose, a modified Leonov model is employed and the spectra and model parameters are estimated through nonlinear regression using measured steady shear viscosity data and extensional viscosity data calculated from Cogswell's method. Using the proposed methodology, the spectra of several resins were estimated and they were used in a Maxwell model to predict the linear viscoelastic properties of these resins. The predicted properties (storage and loss moduli and complex viscosity) were found to be in very good agreement with data from oscillatory shear measurements, thus supporting the validity of the estimated relaxation spectra.

Druh

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

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2000

Kód důvěrnosti údajů

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

Název periodika

Advances in Polymer Technology

ISSN

0730-6679

e-ISSN

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Svazek periodika

19

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

277-286

Kód UT WoS článku

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EID výsledku v databázi Scopus

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