Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111373
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dc.contributor.authorKhasanova, A. Kh.en
dc.contributor.authorWolf, B. A.en
dc.date.accessioned2022-05-12T08:17:09Z-
dc.date.available2022-05-12T08:17:09Z-
dc.date.issued2003-
dc.identifier.citationKhasanova A. Kh. PEO/CHCl3. Crystallinity of the Polymer and Vapor Pressure of the Solvent. Equilibrium and Nonequilibrium Phenomena / A. Kh. Khasanova, B. A. Wolf. — DOI 10.2495/SC210181 // Macromolecules. — 2003. — Vol. 36. — Iss. 17. — P. 6645-6652.en
dc.identifier.issn0024-9297-
dc.identifier.otherAll Open Access, Green3
dc.identifier.urihttp://hdl.handle.net/10995/111373-
dc.description.abstractVapor pressures were measured for the system CHCl3/PEO 1000 (PEO stands for poly(ethylene oxide) and 1000 for Mw in kg/mol) at 25°C as a function of the weight fraction w of the polymer by means of a combination of headspace sampling and gas chromatography. The establishment of thermodynamic equilibria was assisted by employing thin polymer films. The degrees of crystallinity α of the pure PEO and of the solid polymer contained in the mixtures were determined via DSC. An analogous degree of polymer insolubility β was calculated from the vapor pressures measured in this composition range. The experiments demonstrate that both quantities and their concentration dependence are markedly affected by the particular mode of film preparation. These nonequilibrium phenomena are discussed in terms of frozen local and temporal equilibria, where differences between α and β are attributed to the occlusion of amorphous material within crystalline domains. Equilibrium information was obtained from two sources, namely from the vapor pressures in the absence of crystalline material (gas/liquid) and from the saturation concentration PEO (liquid/solid). The thermodynamic consistency of these data is demonstrated using a new approach that enables the modeling of composition dependent interaction parameters by means of two adjustable parameters only.en
dc.description.sponsorshipThe authors are grateful to the “Deutscher Akademischer Austauschdienst” and to the Civilian Research and Development Foundation (USA, REC-005.2001) for financial support.en
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.rightsinfo:eu-repo/semantics/openAccessen
dc.sourceMacromolecules2
dc.sourceMacromoleculesen
dc.subjectAMORPHOUS MATERIALSen
dc.subjectCOMPOSITIONen
dc.subjectCRYSTALLINE MATERIALSen
dc.subjectDIFFERENTIAL SCANNING CALORIMETRYen
dc.subjectGAS CHROMATOGRAPHYen
dc.subjectSOLVENTSen
dc.subjectVAPOR PRESSUREen
dc.subjectDEGREE OF POLYMER INSOLUBILITYen
dc.subjectDEGREES OF CRYSTALLINITYen
dc.subjectTHERMODYNAMIC EQUILIBRIAen
dc.subjectPOLYETHYLENE OXIDESen
dc.titlePEO/CHCl3. Crystallinity of the Polymer and Vapor Pressure of the Solvent. Equilibrium and Nonequilibrium Phenomenaen
dc.typeArticleen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeinfo:eu-repo/semantics/submittedVersionen
dc.identifier.doi10.2495/SC210181-
dc.identifier.scopus0042320563-
local.contributor.employeeKhasanova, A.Kh., Institut fur Physikalische Chemie, Johannes Gutenberg-Univ. Mainz, MFUM, Welder-Weg 13, D-55099 Mainz, Germany, Institute of Phys. and Appl. Math., Ural State University, Lenin Ave. 51, Ekaterinburg, 620083, Russian Federation; Wolf, B.A., Institut fur Physikalische Chemie, Johannes Gutenberg-Univ. Mainz, MFUM, Welder-Weg 13, D-55099 Mainz, Germanyen
local.description.firstpage6645-
local.description.lastpage6652-
local.issue17-
local.volume36-
local.contributor.departmentInstitut fur Physikalische Chemie, Johannes Gutenberg-Univ. Mainz, MFUM, Welder-Weg 13, D-55099 Mainz, Germany; Institute of Phys. and Appl. Math., Ural State University, Lenin Ave. 51, Ekaterinburg, 620083, Russian Federationen
local.identifier.eid2-s2.0-0042320563-
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