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Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F12%3A00377123" target="_blank" >RIV/61389013:_____/12:00377123 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1039/C2SM25432H" target="_blank" >http://dx.doi.org/10.1039/C2SM25432H</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1039/C2SM25432H" target="_blank" >10.1039/C2SM25432H</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Temperature-induced phase separation and hydration in poly(N-vinylcaprolactam) aqueous solutions: a study by NMR and IR spectroscopy, SAXS, and quantum-chemical calculations

  • Original language description

    Temperature-induced phase separation in poly(N-vinylcaprolactam) (PVCL)?D2O solutions was investigated by a combination of NMR and ATR FTIR spectroscopy, SAXS and model quantum-chemical calculations. From FTIR spectra combined with DFT calculations it follows that the amount of fully dehydrated carbonyl groups in PVCL globular structures is rather small. The mechanism of the partial dehydration of PVCL carbonyls at temperatures above the phase transition was elucidated . The strong dependence of transition temperatures on polymer concentration was revealed by NMR and SAXS. NMR spectroscopy also enabled us to determine thermodynamic parameters ?H and ?S characterizing the phase transition. SAXS results have shown that above the transition temperature ?primary mesoglobules of 50 nm in size are formed which aggregate into large agglomerates.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CD - Macromolecular chemistry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA202%2F09%2F1281" target="_blank" >GA202/09/1281: Stimuli-responsive multicomponent polymer systems in aqueous solutions and gels investigated by NMR and other methods</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2012

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Soft Matter

  • ISSN

    1744-683X

  • e-ISSN

  • Volume of the periodical

    8

  • Issue of the periodical within the volume

    22

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    10

  • Pages from-to

    6110-6119

  • UT code for WoS article

    000304100900018

  • EID of the result in the Scopus database