Ultracentrifugation Method to Measure Water-Soluble Monomer Incorporation in Latex
| Autor: | Andrew Klein, Sitaraman Krishnan, Mohamed S. El-Aasser, E. D. Sudol |
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| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Chromatography Polymers and Plastics Aqueous two-phase system Emulsion polymerization Polymer Dilution chemistry.chemical_compound Colloid and Surface Chemistry Monomer Adsorption chemistry Pulmonary surfactant Emulsion Materials Chemistry Physical and Theoretical Chemistry |
| Zdroj: | Colloid and Polymer Science. 283:836-844 |
| ISSN: | 1435-1536 0303-402X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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