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Titre du document / Document title

Measurement of activity of water in aqueous poly(ethylene glycol) solutions (effect of excess volume on the Flory-Huggins X-parameter)

Auteur(s) / Author(s)

ELIASSI A. (1) ; MODARRESS H. (1) ; MANSOORI G. A. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Chemical Engineering Faculty, Amir-Kabir University of Technology, Tehran, IRAN, REPUBLIQUE ISLAMIQUE D'
(2) Department of Chemical Engineering, University of Illinois at Chicago, 810 South Clinton Street, Chicago, Illinois 60607-7000, ETATS-UNIS

Résumé / Abstract

Activities of water are reported for aqueous solutions of poly(ethylene glycol) (PEG) with number average molecular weights of 300, 400, 4000, and 6000 are measured at 35, 45, 55, and 65 °C and at various concentrations from 0 to 40 wt % of PEG using vapor-pressure osmometery. A cubic equation in terms of PEG concentrations is sufficient for correlation of activities. Using measured activities, the Flory-Huggins interaction parameters have been calculated. The effect of temperature, molecular weight of PEG and its concentration, and volume change upon mixing on interaction parameter have been considered. Ignoring the volume change of mixing can lead to an average error of 2.5% with a maximum error of 5.3%.

Revue / Journal Title

Journal of chemical and engineering data    ISSN  0021-9568   CODEN JCEAAX 

Source / Source

1999, vol. 44, no1, pp. 52-55 (12 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Chemical Society, Washington, DC, ETATS-UNIS  (1959) (Revue)

Mots-clés anglais / English Keywords

Water activity

;

Aqueous solution

;

Ethylene oxide polymer

;

Molecular weight property relation

;

Temperature effect

;

Interaction parameter

;

Mots-clés français / French Keywords

Activité eau

;

Solution aqueuse

;

Ethylène oxyde polymère

;

Relation masse moléculaire propriété

;

Effet température

;

Paramètre interaction

;

Mots-clés espagnols / Spanish Keywords

Agua actividad

;

Solución acuosa

;

Etileno óxido polímero

;

Relación masa molecular propiedad

;

Efecto temperatura

;

Parámetro interacción

;

Localisation / Location

INIST-CNRS, Cote INIST : 9196, 35400007357511.0130

Nº notice refdoc (ud4) : 1692985



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