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Interaction of water with macromolecules by dynamic mechanical analysis
Author(s) -
Hiltner Anne
Publication year - 1979
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760191012
Subject(s) - macromolecule , relaxation (psychology) , polymer , ionic bonding , amide , side chain , materials science , chemical physics , polymer chemistry , chemistry , chemical engineering , organic chemistry , composite material , biochemistry , ion , social psychology , engineering , psychology
Abstract The dynamic mechanical relaxation of macromolecules is found to be very sensitive to the presence of water which is strongly associated with the macromolecule. Polymers with the amide group exhibit a characteristic loss process (β or β 2 ) in the region of 200K which is associated with the amide‐water complex. Changes in the relaxation parameters with water content permit the stoichiometry of the interaction to be determined. Polymers with ionic groups on the side chain exhibit a higher temperature relaxation (β 1 ) associated with side chain motion. This relaxation is also affected by the presence of water. Analysis of the effect of water on the loss parameters of the β 2 and β 1 processes has provided insight into the nature of the interaction of water with complex biological macromolecules.