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The state of water in swollen polymers
Author(s) -
Rault Jacques
Publication year - 1995
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.19951000106
Subject(s) - polymer , bound water , materials science , molecule , plasticizer , deuterium , polymer chemistry , hydrogen bond , chemical engineering , thermodynamics , chemistry , organic chemistry , composite material , physics , quantum mechanics , engineering
It is shown that by low frequency measurements in hydrophilic polymers only one state of water is observed. Water behave as a classical plasticizer and ice melting in polymer is similar to ice melting in binary simple mixture. The non crystallizable water in these systems is explained by the Tg regulation effect. In oriented swollen polymers, only one state of water is observed in the time scale ∼ 1/ω q = 10 −5 s by deuterium NMR. This technique gives information on the mean orientation of D 2 O molecules in the oriented polymer and on the fraction of mobile water molecules. The concept of bound and unbound water is not relevant for explaining the DSC and D‐NMR results.