Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
Special Issue for IACIS2012
NMR and Thermodynamic Study of Phase Transition in Aqueous Solutions of Thermoresponsive Amphiphilic Polymer
Lenka HanykovaMarek Radecki
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Volume 41 (2012) Issue 10 Pages 1044-1046

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Abstract

1H NMR techniques combined with differential scanning calorimetry (DSC) experiments are employed to investigate the temperature-induced phase transition in aqueous poly(vinyl methyl ether) solutions. NMR data were used to construct van’t Hoff plots, and changes in the enthalpy and entropy characterizing the phase transition were determined. It follows from a comparison of NMR and DSC thermodynamic parameters (ΔH values) for solutions with c = 1–30 wt % that the size of the cooperative units (domains) undergoing the transition corresponds to the whole polymer chain.

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© 2012 The Chemical Society of Japan
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