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Determination of size and effective surface charge of polystyrene latex particles in concentrated dispersion by SANS
Author(s) -
Jayasuriya D. S.,
Tcheurekdjian N.,
Wu C. F.,
Chen S. H.,
Thiyagarajan P.
Publication year - 1988
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889888004066
Subject(s) - polystyrene , dispersity , dispersion (optics) , small angle neutron scattering , particle (ecology) , scattering , neutron scattering , analytical chemistry (journal) , surface charge , materials science , particle size , chemistry , polymer chemistry , chromatography , optics , composite material , physics , polymer , oceanography , geology
Small‐angle neutron scattering (SANS) measurements were carried out on two series of ion‐exchanged charged polystyrene latex (average particle diameters: 340 and 380 Å) dispersions in deuterated water [88%( v / v ) D 2 O] with particle volume fractions between 0.0075 and 0.074. Absolute scattering intensity profiles obtained were fitted to a model based on generalized one‐component macroion theory to evaluate average particle diameter with the polydispersity and effective surface charge. The particle size parameters computed agreed well with electron microscopy data. However, effective surface charges obtained were only 6–7% of that determined by conductometric titration.