NMR study of thermoresponsive block copolymer in aqueous solution
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00460278" target="_blank" >RIV/61389013:_____/16:00460278 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/macp.201600025" target="_blank" >http://dx.doi.org/10.1002/macp.201600025</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/macp.201600025" target="_blank" >10.1002/macp.201600025</a>
Alternative languages
Result language
angličtina
Original language name
NMR study of thermoresponsive block copolymer in aqueous solution
Original language description
Temperature behavior of D2O solutions of poly(ethylene oxide) (PEO)114-block-poly(N-isopropylacrylamide) (PNIPAm)109 is characterized by NMR methods. At temperatures above the lower critical solution temperature (LCST) transition of PNIPAm component, 1H NMR spectra are consistent with existence of micelles where immobilized PNIPAm blocks form rather compact core and mobile PEO blocks form a shell of micelles. The transition of PNIPAm component shifts toward lower temperatures with increasing polymer concentration. 2D nuclear Overhauser effect spectroscopy spectra which can provide information on proton groups in close spatial contact (<0.5 nm) show an increase in intensity of cross-peaks between PEO protons and main chain CH and CH2 protons, and isopropyl CH protons of PNIPAm units after increasing the temperature from 292.7 to 301.6 K. The fact that this change occurs at temperature, which is still below the LCST transition of PNIPAm component evidences certain conformation changes in the PEO-b-PNIPAm block copolymer already in the pretransition region.
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/GA15-13853S" target="_blank" >GA15-13853S: Structures and interactions in aqueous solutions of thermoresponsive polymers of a new type</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Macromolecular Chemistry and Physics
ISSN
1022-1352
e-ISSN
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Volume of the periodical
217
Issue of the periodical within the volume
12
Country of publishing house
DE - GERMANY
Number of pages
6
Pages from-to
1370-1375
UT code for WoS article
000380018700006
EID of the result in the Scopus database
2-s2.0-84977962658