Temperature-induced phase separation and hydration in aqueous polymer solutions studied by NMR and IR spectroscopy: comparison of poly(N-vinylcaprolactam) and acrylamide-based polymers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F14%3A00425182" target="_blank" >RIV/61389013:_____/14:00425182 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1002/masy.201300002" target="_blank" >http://dx.doi.org/10.1002/masy.201300002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/masy.201300002" target="_blank" >10.1002/masy.201300002</a>

Result language

angličtina

Original language name

Temperature-induced phase separation and hydration in aqueous polymer solutions studied by NMR and IR spectroscopy: comparison of poly(N-vinylcaprolactam) and acrylamide-based polymers

Original language description

Using NMR and IR spectroscopy we compared the LCST behaviour of two types of thermoresponsive polymer systems, poly(N-vinylcaprolactam) (PVCL) and acrylamide-based polymers in aqueous solutions. We confirmed that during phase separation both PVCL and poly(N-isopropylmethacrylamide) (PNIPMAm) chains undergo coil-globule transition. At the same time some important differences were found for PVCL in comparison with PNIPMAm and poly(N-isopropylacrylamide) (PNIPAm), especially a much lower level of dehydration of PVCL segments at temperatures above the phase transition. We assume that the origin of these differences can be in different structure of respective monomer units. From time dependences of ATR FTIR spectra it follows that the low degree of dehydration of PVCL segments is not changed with time. Small increase in the wavenumbers of the Amide I components of the hydrated PVCL carbonyl groups with time indicates that water released from PVCL mesoglobules with time, as revealed from NMR

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Macromolecular Symposia

ISSN

1022-1360

e-ISSN

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Volume of the periodical

336

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

39-46

UT code for WoS article

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EID of the result in the Scopus database

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