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Characterization of dilute polymer solutions and dispersions by dynamic light scattering ‐exemplified by polystyrene and photographic emulsions‐
Author(s) -
Helmstedt Martin
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.19880180104
Subject(s) - polystyrene , dispersity , light scattering , polymer , cyclohexane , characterization (materials science) , materials science , rayleigh scattering , scattering , dynamic light scattering , diffusion , polymer chemistry , optics , analytical chemistry (journal) , chemistry , thermodynamics , physics , nanotechnology , chromatography , organic chemistry , composite material , nanoparticle
A survey of light scattering methods in the field of polymer characterization and an introduction into fundamental relations of quasielastic light scattering are given. The partially home made RAYLEIGH spectrophotometer and its calibration is described. For monodisperse polystyrene dispersions a maximum deviation of 2 % is obtained. The translational diffusion coefficients of approximately monodisperse linear polystyrene samples dissolved in cyclohexane under theta conditions at 34.5 degrees C agree well with the relation of PETRUS et al., D 0 = 1.388 · 10 −4 M −0.5 . Over a broad range of molecular masses the values measured in 2‐butanone at 25 degrees C give the relation D 0 = 6. 16 · 10 −4 M −0.577 with a small deviation from earlier published data. Results for the growth of silver halide particles during the preparation of photographic seed emulsions are given.