title: Separation of parent homopolymers from polystyrene and poly(ethylene oxide) based block copolymers by liquid chromatography under limiting conditions of desorption-3. Study of barrier efficiency according to block copolymers' chemical composition.
abstract: Liquid Chromatography under Limiting Conditions of Desorption (LC LCD) is a powerful separation tool for multicomponent polymer systems. This technique is based on a barrier effect of an appropriate solvent, which is injected in front of the sample, and which decelerates the elution of selected macromolecules. In this study, the barrier effects have been evaluated for triblock copolymers polystyrene-b-poly(ethylene oxide)-b-polystyrene (PS-b-PEO-b-PS) according to the content of polystyrene (wt% PS) and PEO-block molar mass. PS-b-PEO-b-PS samples were prepared by Atom Transfer Radical Polymerization (ATRP). The presence of respective parent homopolymers was investigated by applying optimized LC LCD conditions. It was found that the barrier composition largely affects the efficiency of separation and it ought to be adjusted for particular composition range of block copolymers.
authors: Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France. Electronic address: marion.rollet@univ-amu.fr.
authors: Marion
authors: M
authors: Rollet
authors: Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France.
authors: Bérengère
authors: B
authors: Pelletier
authors: Polymer Institute of the Slovak Academy of Sciences, 84541 Bratislava, Slovakia.
authors: Dušan
authors: D
authors: Berek
authors: Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France.
authors: Sébastien
authors: S
authors: Maria
authors: Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France.
authors: Trang N T
authors: TN
authors: Phan
authors: Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille cedex 20, France. Electronic address: didier.gigmes@univ-amu.fr.
authors: Didier
authors: D
authors: Gigmes
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008970:Molecular Weight; D011092:Polyethylene Glycols / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000737:chemistry* / Q000302:isolation & purification*; D011137:Polystyrenes / Q000737:chemistry*; D012997:Solvents
chemical_list: D011108:Polymers; D011137:Polystyrenes; D012997:Solvents; C541965:polystyrene-b-poly(ethylene oxide); D011092:Polyethylene Glycols
keywords: Barriers efficiency; Liquid chromatography under limiting conditions of desorption; Polystyrene-b-poly(ethylene oxide)-b-polystyrene