Abstract
Poly(styrene—co-methylmetharcylate) samples have separated according to their chemical composition on silica columns by gradient elution with 2,2,4-trimethylpentane, tetrahydrofuran and methanol as mobile phase components. The eluent composition at peak position for separation on silica and on reversed-phase packings is compared with the solubility measured by turbidimetric titration in a similar solvent—non-solvent system. From the results and also froom high-performance liquid chromatograhic experiments with varying initial conditions fort he solvent gradient, it can be concluded that, in silica columns, solubillity and adsorption phenomena govern the separation of styrene methylmethacrylate copolymers according to their composition.
Published Version
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