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Effect of excess enthalpies on binary mixtures containing propylene glycols and poly(propylene glycols) + dimethyl carbonate at 308.15 K
- Source :
- 412 (2004): 125–129., info:cnr-pdr/source/autori:C. Castellari, D. Vitalini, F. Comelli, R. Francesconi/titolo:Effect of excess enthalpies on binary mixtures containing propylene glycols and poly(propylene glycols) + dimethyl carbonate at 308.15 K/doi:/rivista:/anno:2004/pagina_da:125/pagina_a:129/intervallo_pagine:125–129/volume:412
- Publication Year :
- 2004
-
Abstract
- Excess enthalpies have been determined at atmospheric pressure and at 308.15 K over the entire range of composition for binary mixtures containing propylene glycol (PG), dipropylene glycol (DPG), tripropylene glycol (TPG), poly(propylene glycol)-400, -725, -1200, -2000 + dimethyl carbonate (DMC). From the experimetal data, excess enthalpies, H E , and standard deviations in enthalpy, σ ( H E ) have been calculated. The experimental data were fitted to a Redlich–Kister polynomial to obtain the binary adjustable parameters, a k . The H E values are positive over the entire range of composition, decreasing with the increase of the molecular weight of glycols. The mixtures containing polydisperse glycols behave as regular solutions. Conclusions were qualitatively discussed in terms of molecular interactions.
- Subjects :
- chemistry.chemical_classification
Atmospheric pressure
Diol
Inorganic chemistry
Enthalpy
Binary number
Polymer
Condensed Matter Physics
Polyvinyl alcohol
chemistry.chemical_compound
chemistry
Dipropylene glycol
Physical chemistry
Physical and Theoretical Chemistry
Dimethyl carbonate
Instrumentation
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 412 (2004): 125–129., info:cnr-pdr/source/autori:C. Castellari, D. Vitalini, F. Comelli, R. Francesconi/titolo:Effect of excess enthalpies on binary mixtures containing propylene glycols and poly(propylene glycols) + dimethyl carbonate at 308.15 K/doi:/rivista:/anno:2004/pagina_da:125/pagina_a:129/intervallo_pagine:125–129/volume:412
- Accession number :
- edsair.doi.dedup.....9d14e13e8caebdc4acb328630710f66d