Particle Size Measurements for Polymer Latexes by Liquid Chromatography Using Porous Silica Packings

Abstract

Particle size measurements for methylmethacrylate (MMA) -methacrylic acid (MAA) copolymer latexes were carried out by porous hydrodynamic chromatography (PHDC) using porous silica packings of which pore sizes were larger than latex particle diameters. The packings were treated with 3-chloropropyl trichlorosilane to reduce adsorption due to the surface hydroxyl group. The particle diameters of the latexes, which were estimated by the diameter-retention volume calibration curve obtained with the standard polystyrene latexes, were in good agreement with the hydrodynamic ones measured by dynamic light scattering method.