Abstract
Separation of styrene-methyl methacrylate-acrylonitrile terpolymers by chemical composition was studied using high-performance liquid chromatography(HPLC). Cross-linked polyacrylonitrile gel or polyacrylamide gel as a stationary phase and mixture of chloroform, acetonitrile and n-hexane as an eluent were used in the normal phase HPLC. For the reversed-phase HPLC, polystyrene gel and a mixture of chloroform and acetonitrile were used as a stationary phase and an eluent, respectively. Solvent gradient of increasing chloroform content was utilized. In the case of normal phase HPLC terpolymer was eluted from the non-polar polymer, while from the polar polymer in the case of reversed-phase HPLC. Individual terpolymers were completely separated from a mixture of nine terpolymers by cross-fractionation using the combination of HPLC with acrylonitrile and acrylamide column or acrylonitrile and styrene column system.
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