title: Separation of linear synthetic polymers in non-aqueous capillary zone electrophoresis using cationic surfactant.
abstract: A method for separating water-insoluble and neutral synthetic polymers using non-aqueous capillary zone electrophoresis (NACZE) was developed. The non-aqueous solvent system comprising a mixture of tetrahydrofuran, acetonitrile, and ethanol containing cetyltrimethylammonium chloride was used for solubilizing and conferring positive charges to the polymers. A mixture of polystyrene (PS, Mn=6500) and polybutadiene (PBD, Mn=5900) was successfully separated by the NACZE method using cationic surfactants. Evaluation of the effect of the molecular weight of the polymers on the electrophoretic behavior demonstrated that PSs with different molecular weights (Mn=6500, 10,200, 19,600, 200,000) were co-eluted as a single peak. That is, the apparent electrophoretic mobility of the PSs was independent of the molecular weight. In contrast, evaluation of PBD and polycarbonate (PC) demonstrated that the solubility of polymers in the medium affected the apparent electrophoretic mobility of the polymers, where low solubility resulted in reduced apparent electrophoretic mobility. Using the proposed method, poly(styrene-co-methylmethacrylate)s with different compositions were successfully separated.
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yamamura
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan. Electronic address: kitagawa.shinya@nitech.ac.jp.
authors.forename: Shinya
authors.initials: S
authors.lastname: Kitagawa
authors.affiliation: Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Ohtani
mesh_terms: D002070:Butadienes / Q000302:isolation & purification*; D020724:Elastomers / Q000302:isolation & purification*; D019075:Electrophoresis, Capillary / Q000379:methods; D008970:Molecular Weight; D011076:Polycarboxylate Cement / Q000302:isolation & purification*; D019904:Polymethyl Methacrylate / Q000302:isolation & purification*; D011137:Polystyrenes / Q000302:isolation & purification*; D012995:Solubility; D012997:Solvents; D013501:Surface-Active Agents
chemical_list: D002070:Butadienes; D020724:Elastomers; D011076:Polycarboxylate Cement; D011137:Polystyrenes; D012997:Solvents; D013501:Surface-Active Agents; C000600071:poly(styrene-co-methylmethacrylate); C005506:polycarbonate; C028834:polybutadiene; D019904:Polymethyl Methacrylate
keywords: Cetyltrimethylammonium chloride; Copolymer; Molecular weight; Non-aqueous capillary electrophoresis; Water-insoluble synthetic polymer