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1H NMR study of temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers

SYSNO ASEP	0343295
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	1H NMR study of temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) copolymers
Author(s)	Kouřilová, H. (CZ) Šťastná, J. (CZ) Hanyková, L. (CZ) Sedláková, Zdeňka (UMCH-V)_{RID, ORCID} Spěváček, Jiří (UMCH-V)_{RID, ORCID}
Source Title	European Polymer Journal. - : Elsevier - ISSN 0014-3057 Roč. 46, č. 6 (2010), s. 1299-1306
Number of pages	8 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	phase-separation ; poly(N-isopropylmethacrylamide) aqueous solution ; poly(N-isopropylmethacrylamide-co-acrylamide) copolymer
Subject RIV	CD - Macromolecular Chemistry
R&D Projects	GA202/09/1281 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z40500505 - UMCH-V (2005-2011)
UT WOS	000279085200014
DOI	10.1016/j.eurpolymj.2010.03.006
Annotation	1H NMR spectroscopy was applied to investigate temperature-induced phase separation in solutions of poly(N-isopropylmethacrylamide-co-acrylamide) [P(IPMAm/AAm)] random copolymers in D2O, D2O/ethanol and D2O/acetone. For solutions of the copolymers with the AAm fraction not exceeding 16 mol% 1H NMR spectra show dynamic heterogeneity of copolymer chains in mesoglobules where AAm sequences and surrounding IPMAm sequences are hydrated and mobile, while other IPMAm sequences are dehydrated and their mobility is strongly reduced. The obtained results are consistent with the idea that P(IPMAm/AAm) copolymer mesoglobules are rather porous and disordered.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2011

Number of the records: 1