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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

  • 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/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

  • 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