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S. Krishnan, A. Klein, M. El-Aasser, E. Sudoł (2003)
Relative Importance of the Effects of Seed and Feed Stage Agitations on Latex Properties in Semibatch Emulsion Copolymerization of n‐Butyl Methacrylate and N‐Methylol AcrylamidePolymer Reaction Engineering, 11
S. Krishnan, A. Klein, M. El-Aasser, E. Sudoł (2003)
Influence of Chain Transfer Agent on the Cross-Linking of Poly(n-butyl methacrylate-co-N-methylol acrylamide) Latex Particles and FilmsMacromolecules, 36
F. Kooij, A. Philipse, J. Dhont (2000)
Sedimentation and Diffusion in Suspensions of Sterically Stabilized Colloidal PlateletsLangmuir, 16
G. Batchelor, J. Green (1972)
The determination of the bulk stress in a suspension of spherical particles to order c2Journal of Fluid Mechanics, 56
Emulsion copolymerizations involving water-soluble functional monomers such as N-methylolacrylamide often result in the formation of water-soluble polymer that remains in the aqueous phase of the latex. A simple procedure is developed to determine the amount of water-soluble polymer in the aqueous phase of a high-solids latex using ultracentrifugation. Dilution of the latex with water is usually found necessary for good separation during ultracentrifugation. If the latex contains a surface-active species (surfactant) in amounts comparable to the amount of water-soluble polymer, calculation of the amount of water-soluble polymer in the serum of the original latex will require information about dilution dependent partitioning of the surfactant between the surface of the particles and the aqueous phase. This paper outlines a procedure that enables determination of the amount of water-soluble polymer in the aqueous phase of the original latex, by ultracentrifugation of the latex diluted to different concentrations. The procedure also gives the Henry’s constant for the adsorption of the surfactant on the surface of the polymer particles in the latex.
Colloid Polymer Science – Springer Journals
Published: Aug 4, 2004
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