NMR and DSC study of temperature-induced phase transition in aqueous solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10125883" target="_blank" >RIV/00216208:11320/12:10125883 - isvavai.cz</a>

Alternative codes found

RIV/61389013:_____/12:00382101

Result on the web

<a href="http://dx.doi.org/10.1007/s00396-012-2701-3" target="_blank" >http://dx.doi.org/10.1007/s00396-012-2701-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00396-012-2701-3" target="_blank" >10.1007/s00396-012-2701-3</a>

Result language

angličtina

Original language name

NMR and DSC study of temperature-induced phase transition in aqueous solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers

Original language description

Combination of H-1 NMR spectroscopy and differential scanning calorimetry (DSC) was used to investigate temperature-induced phase transition in D2O solutions of poly(N-isopropylmethacrylamide-co-acrylamide) random copolymers. Both the NMR and DSC data showed dependence on the acrylamide (AAm) content in the copolymer; with increasing AAm content, the phase transition is shifted to higher temperatures, and both phase-separated fractions determined by NMR and change of the enthalpy determined by DSC decrease faster than the content of thermosensitive N-isopropylmethacrylamide (NIPMAm) units in the copolymer. NMR data were used to construct van't Hoff plots, and changes of the enthalpy Delta H and entropy Delta S, characterizing the phase transition, weredetermined. As it follows from comparison of NMR and DSC thermodynamical parameters (Delta H values), the size of the cooperative units (domains), undergoing the transition as a whole, decreases with increasing AAm content in the copolym

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2012

Confidentiality

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

Name of the periodical

Colloid and Polymer Science

ISSN

0303-402X

e-ISSN

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Volume of the periodical

290

Issue of the periodical within the volume

17

Country of publishing house

DE - GERMANY

Number of pages

7

Pages from-to

1811-1817

UT code for WoS article

000310319000011

EID of the result in the Scopus database

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