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
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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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
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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
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