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1H NMR relaxation study of thermotropic phase transition in poly(vinyl methyl ether)/D2O solutions
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SYSNO ASEP 0105728 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title 1H NMR relaxation study of thermotropic phase transition in poly(vinyl methyl ether)/D2O solutions Title 1H NMR relaxační studie termotropního fázového přechodu v D2O roztocích polyvinylmetyléteru Author(s) Spěváček, Jiří (UMCH-V) RID, ORCID
Hanyková, L. (CZ)
Starovoytova, L. (CZ)Source Title Macromolecules. - : American Chemical Society - ISSN 0024-9297
Roč. 37, č. 7 (2004), s. 1433-1443Number of pages 9 s. Language eng - English Country US - United States Keywords thermotropic phase transition ; aqueous solutions ; poly(vinyl methyl ether) Subject RIV CD - Macromolecular Chemistry R&D Projects IAA4050209 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z4050913 - UMCH-V Annotation Measurements of spin-spin relaxation times of PVME methylene protons have shown that globular structures are more compact in dilute solutions in comparison with semidilute and concentrated solutions where globules contain a certain amount of water. While the phase separation in dilute PVME solutions is associated with rapid dehydration of polymer chains, for semidilute and concentrated solutions T2 measurements evidence that with time the originally bound water is slowly released from globular-like structures, and the character of the globules is changed from the spongelike to a rather compact one. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2005
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