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Changes in NMR characteristics of cotton and wool during water adsorption
Author(s) -
Svanson S. E.
Publication year - 1978
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1978.070220224
Subject(s) - wool , adsorption , sorption , penetration (warfare) , polymer , polymer chemistry , materials science , chemical engineering , polymer science , chemical physics , chemistry , composite material , organic chemistry , mathematics , engineering , operations research
NMR signals have been followed for cotton and wool materials during humidification of the fibers. It is shown that the adsorbed water is present in two main states of different mobilities and that the relative velocities for the penetration of the water to these different states can easily be followed. It has been observed that the amount of adsorbed water with low mobility, in the primary sites, grows more rapidly in cotton than in wool during the sorption. Overlap between the signal contributions from water with reduced mobility and from the polymer chains makes observations of the segmental mobility of the polymer chains difficult.