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Self‐diffusion of azo dyes in poly(vinyl chloride) gels and solutions: Dye‐polymer interactions
Author(s) -
Griffin William G.,
Griffin Mary C. A.
Publication year - 1991
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.19910450127
Subject(s) - diffusion , polymer , vinyl chloride , polymer chemistry , chloride , light scattering , chemistry , vinyl polymer , phthalate , rayleigh scattering , materials science , chemical engineering , scattering , thermodynamics , organic chemistry , optics , copolymer , physics , engineering
Measurements of the self‐diffusion coefficients of two azo dyes in poly(vinyl chloride)/bis(2‐ethylhexyl) phthalate gels and solutions by the forced Rayleigh scattering technique are reported. The dependence of dye diffusion coefficients on polymer concentration and temperature has been determined and it is observed that both dyes seem to bind reversibly to the polymer. The energetics of dye binding are analyzed and the apparent dependence of the equilibrium dye‐binding coefficients on the polymer concentration is discussed.