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NMR study of water bound to soft segments in thermoplastic elastomers
Author(s) -
Horstmann Martin,
Urbani Marcus,
Veeman Wiebren S.
Publication year - 2004
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.200450112
Subject(s) - elastomer , materials science , proton nmr , hydrogen bond , thermoplastic elastomer , ether , polymer chemistry , nuclear magnetic resonance spectroscopy , pulsed field gradient , copolymer , polymer , chemistry , nuclear magnetic resonance , analytical chemistry (journal) , composite material , organic chemistry , molecule , physics
The interaction between water absorbed in four hard‐soft segment block‐copolymers and the polymer chains is investigated by pulsed field gradient echo NMR spectroscopy and Nuclear Overhauser NMR spectroscopy. The results show, depending on the structure and mass fraction of the soft segments, a strong interaction between water and the soft segments. Most likely this is due to a hydrogen bond between water and the ether groups. The self‐diffusion of water has been determined and is described as a jumping process between the ether sites with a residence time t and a time between sites t. It is found that the residence time is of the order of a few ns and also that the ratio t/ τ decreases with increasing soft segment rigidity.