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Phase Separation in Aqueous Polymer Solutions as Studied by NMR Methods
Author(s) -
Spěváček Jiří
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200550401
Subject(s) - aqueous solution , polymer , polymer chemistry , copolymer , materials science , ether , solvent , relaxation (psychology) , phase (matter) , methacrylate , methyl methacrylate , chemistry , chemical engineering , organic chemistry , psychology , social psychology , engineering , composite material
Some possibilities of 1 H NMR spectroscopy in investigations of structural‐dynamic changes and polymer‐solvent interactions during the temperature‐induced phase transitions in aqueous polymer solutions are described. Results obtained recently on D 2 O solutions of poly(vinyl methyl ether) (PVME), poly( N ‐isopropylmethacrylamide) (PIPMAm), negatively charged copolymers of N ‐isopropylmethacrylamide and sodium methacrylate, and PIPMAm/PVME mixtures are discussed. A markedly different rate of dehydration process in dilute solutions on the one hand, and in semidilute and concentrated solutions on the other hand, was revealed from 1 H spin‐spin relaxation measurements.