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Stimuli-responsive polymers in solution investigated by NMR and infrared spectroscopy
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SYSNO ASEP 0360533 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Stimuli-responsive polymers in solution investigated by NMR and infrared spectroscopy Author(s) Spěváček, Jiří (UMCH-V) RID, ORCID
Dybal, Jiří (UMCH-V) RID, ORCIDSource Title Macromolecular Symposia. - : Wiley - ISSN 1022-1360
Roč. 303, č. 1 (2011), s. 17-25Number of pages 9 s. Action International IUPAC Conference on Polymer-solvent Complexes and Intercalates /8./ Event date 05.07.2010-08.07.2010 VEvent location Strasbourg Country FR - France Event type WRD Language eng - English Country DE - Germany Keywords aqueous solutions ; infrared spectroscopy ; NMR 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 000298817400003 DOI 10.1002/masy.201150503 Annotation Temperature-induced and solvent composition-induced phase separation in solutions of poly(N-isopropylmethacrylamide) (PIPMAm) and other thermoresponsive polymers as studied by NMR and infrared (IR) spectroscopy is discussed. The fraction p of phase-separated units (units with significantly reduced mobility) and subsequently, e.g., thermodynamic parameters characterizing the coil-globule phase transition induced by temperature, were determined from reduced integrated intensities in high-resolution 1H NMR spectra. This approach can be especially useful in investigations of phase separation in solutions of binary polymer systems. Information on behaviour of water during temperature-induced phase transition was obtained from measurements of 1H NMR relaxation times of HDO molecules. NMR and IR spectroscopy were used to investigate PIPMAm solutions in water/ethanol (D2O/EtOH) mixtures where the phase separation can be induced by solvent composition (cononsolvency). Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2012
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