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Applications and limitations of deuterium labeling methods to neutron scattering studies of polymers
Author(s) -
Wignall G. D.,
Bates F. S.
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880150108
Subject(s) - deuterium , polymer , neutron scattering , polymerization , scattering , neutron , molecule , protonation , chemical physics , range (aeronautics) , chemistry , materials science , nuclear physics , thermodynamics , physics , organic chemistry , optics , composite material , ion
Deuterium labeling techniques have been widely used to study polymer chain configuration and motion, based on the assumption that the H‐ and D‐ chains are thermodynamically identical and that the interaction parameter between them, X HD is zero. By an appropriate choice of the degree of polymerization and temperature, both critical scattering and phase separation can be made to occur, due solely to the small but finite thermodynamic differences between protonated and deuterated molecules. These experiments helped delineate the range of validity of the assumptions which had been used hitherto in neutron scattering studies of polymers. The majority of previous experiments, carried out at modest molecular weights, have been shown to be in large part unaffected by such effects.