Abstract
Abstract The percent gel of a number of acrylic latexes was measured by size exclusion chromatography (SEC). Latexes studied were emulsion polymerized butyl acrylate/methyl methacrylate copolyraers with up to 70% gel content. Tetrahydrofuran (TFH) was used as the solvent for the latex and chromatographic mobile phase. To optimize the separation, various pore sizes of controlled porosity glass (CPG-10) column packing were tested. Best results were obtained for a combination of three columns (3/8 inch I. D. and 4 foot long) packed with 75A, 370A and 729A porosity CPG packings. The SEC results with analysis time of less than 2 hours compared favorably with those of the conventional gravimetric gel content method.
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