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Measurement and modeling of densities and sound velocities of the systems poly(propylene glycol) + methanol, +ethanol, +1-propanol, +2-propanol and +1-butanol at T = 298.15 K
Physical Chemistry Department, University of Tabriz.
Physical Chemistry Department, University of Tabriz.
Physical Chemistry Department, University of Tabriz.ORCID-id: 0000-0002-6516-1230
2006 (Engelska)Ingår i: Journal of Chemical Thermodynamics, ISSN 0021-9614, E-ISSN 1096-3626, Vol. 38, nr 3, s. 257-263Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Experiments have been performed at T = 298.15 K to measure the density and sound velocity of the systems {poly(propylene glycol) + methanol, +ethanol, +1-propanol, 2-propanol and +1-butanol} over the whole range of composition. From these measurements, values of the excess molar volume (Vmex)">(Vmex) and excess molar isentropic compression, Ks,mex">Ks,mex , equal to -(∂Vmex/∂p)s">-(∂Vmex/∂p)s were calculated. The excess molar volume for all of these systems were found to be negative and decreases in magnitude as size of alcohol increases, except for 2-propanol solutions for which the magnitude of the excess volume is higher than that of 1-butanol solutions. Expressions for VmexandKs,mex">VmexandKs,mex of polymer solutions were obtained for the model of Flory–Huggins and the polymer non-random two liquid (NRTL) model. These expressions were used to fit the experimental VmexandKs,mex">VmexandKs,mex data of the investigated systems.

Ort, förlag, år, upplaga, sidor
Elsevier, 2006. Vol. 38, nr 3, s. 257-263
Nationell ämneskategori
Teknik och teknologier Biomaterial
Forskningsämne
Trä och bionanokompositer
Identifikatorer
URN: urn:nbn:se:ltu:diva-61905DOI: 10.1016/j.jct.2005.05.011Scopus ID: 2-s2.0-33244494274OAI: oai:DiVA.org:ltu-61905DiVA, id: diva2:1073177
Tillgänglig från: 2017-02-09 Skapad: 2017-02-09 Senast uppdaterad: 2018-03-19Bibliografiskt granskad

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