Application of the Serum Replacement Technique in the Characterization of an Ethyl Acrylate-Methyl Methacrylate Copolymer Latex
The serum replacement technique has been used to “clean” an industrial ethyl aerylate-methyl methacrylate copolymer latex prepared in the presence of acrylic acid monomer. The “cleaning” method allowed the separation of the cleaned latex particles from the serum in a form suitable for further analysis. Both the cleaned latex particles and the serum were analyzed by several methods. Serum replacement recovered about 90% of an anionic surfactant and almost all of the nonionic surfactant used in the preparation of the latex. 17.6% of the initiators used in the preparation of the latex were found to be chemically-bound to the surface of the particles. The acrylic acid monomer found on the surface of the particles and in the aqueous phase amounted to 29.85% and 28.61%, respectively, of the total amount of acrylic acid used in the preparation of the latex. The rest of the acrylic acid was assumed to be buried inside the latex particles.
KeywordsAcrylic Acid Latex Particle Functional Monomer Serum Replacement Ethyl Acrylate
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