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Application of rayleigh spectroscopy to the study of emulsion and dispersion polymerization and polymers
Author(s) -
Killgoar Paul C.,
Dickie Ray A.
Publication year - 1977
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.1977.070210709
Subject(s) - dispersity , dispersion polymerization , dispersion (optics) , rayleigh scattering , materials science , dynamic light scattering , emulsion polymerization , particle size , particle (ecology) , polymerization , polymer , hydrodynamic radius , light scattering , emulsion , spectroscopy , particle size distribution , radius , analytical chemistry (journal) , polymer chemistry , scattering , optics , chemical engineering , composite material , chemistry , chromatography , copolymer , physics , nanoparticle , nanotechnology , engineering , quantum mechanics , computer security , computer science , oceanography , geology
Application of Rayleigh spectroscopy for characterization of particle size in nonaqueous dispersion and water‐based emulsion paint resins is described. The technique allows a straightforward and rapid estimation of particle size; the measurement does not require exact determination of scatterer concentration. For monodisperse samples, unambiguous results are obtained for particles at least up to 50 μm in diameter; for polydisperse samples, an average size heavily weighted by large particles is obtained. Typical experimental results on monodisperse and polydisperse water‐based latexes and on polydisperse nonaqueous dispersion resins are described. In the latter case, comparison of electron micrograph and light scattering size determinations indicates that the light scattering experiment yields approximately a z ‐average radius. Observations on particle formation and growth during polymerization are also described.