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The electrokinetic characterization and colloidal stability of functionalized latexes, two sulfonated polystyrene model colloids prepared by different methods, are described. JM1 latex was synthesized by an emulsion copolymerization process from styrene and sodium styrene sulfonate (NaSS) in the absence of an emulsifier. SN9 latex was prepared by a two-stage shot-growth emulsion polymerization...
Measurements have been done of the effective diffusion coefficient versus ionic strength (KBr) of isolated monodisperse polystyrene particles (≈200 nm in diameter) with different superficial groups, sulfonated and carboxylic, via photon correlation spectroscopy (PCS). The sulfonated latexes behave as could be expected according to the DLVO theory of colloidal stability. However, the carboxylic latexes...
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