Temperature-induced phase transition in aqueous solutions of poly(N-isopropylacrylamide)-based block copolymer
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00465712" target="_blank" >RIV/61389013:_____/16:00465712 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/masy.201600058" target="_blank" >http://dx.doi.org/10.1002/masy.201600058</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/masy.201600058" target="_blank" >10.1002/masy.201600058</a>
Alternative languages
Result language
angličtina
Original language name
Temperature-induced phase transition in aqueous solutions of poly(N-isopropylacrylamide)-based block copolymer
Original language description
Temperature-induced phase transition in D2O solutions of the poly(ethylene oxide)(PEO)-b-poly(N-isopropylacrylamide)(PNIPAm) block copolymer was investigated and compared with the LCST transition of the PNIPAm homopolymer. We confirmed that the temperature behavior of solutions of the PEO-b-PNIPAm in NMR spectra is in accord with existence of micelles where immobilized PNIPAm blocks form rather compact core and mobile PEO blocks form a shell of micelles. By combination of NMR and IR spectroscopy, and DSC we have found that the phase transition and globular structures of the PNIPAm component are significantly affected by the presence of the PEO block. E.g., at temperatures above the phase transition the degree of dehydration of PNIPAm segments (C[DOUBLE BOND]O groups) is two times larger in the block copolymer in comparison with the neat PNIPAm. 2D NOESY spectra revealed certain conformation changes in the solution of 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 Symposia
ISSN
1022-1360
e-ISSN
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Volume of the periodical
369
Issue of the periodical within the volume
1
Country of publishing house
DE - GERMANY
Number of pages
5
Pages from-to
92-96
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-84995932422