title: Separation of parent homopolymers from poly(ethylene oxide) and polystyrene-based block copolymers by liquid chromatography under limiting conditions of desorption--1. Determination of the suitable molar mass range and optimization of chromatographic conditions.
abstract: We studied molar mass limits for the LC LCD separation of parent polystyrene (PS) and poly(ethylene oxide) (PEO) homopolymers from PEO/PS based block copolymers and we identified optimized chromatographic conditions. Time delays between barriers and sample injections were 0-2-3'10. Eluent was composed of dimethylformamide (DMF) 40 wt.% and 1-chlorobutane (CLB) 60 wt.%; Barrier 1 (B1), which retained block copolymer, was composed of 100 wt.% CLB and Barrier 2 (B2), which retained PEO, was a mixture of DMF and CLB, which proportions were adjusted to studied block copolymers. With B2 composed of DMF 23 wt.% and CLB 77 wt.%, we obtained successful separation of PS23K-b-PEO35K-b-PS23K (56.5 wt.% of PS, the subscripts indicate the molar mass in kg mol(-1) of each polymer part in the block copolymer) from its parent homopolymers. With B2 adjusted to DMF 30 wt.% and CLB 70 wt.%, PS2.3K-b-PEO3.1K (42.6 wt.% of PS) was also efficiently separated from its parent homopolymers.
authors: Aix Marseille Université, 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 Université, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille Cedex 20, France.
authors: Bérengère
authors: B
authors: Pelletier
authors: Aix Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille Cedex 20, France.
authors: Anaïs
authors: A
authors: Altounian
authors: Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 84541 Bratislava, Slovakia.
authors: Dusan
authors: D
authors: Berek
authors: Aix Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille Cedex 20, France.
authors: Sébastien
authors: S
authors: Maria
authors: Aix Marseille Université, CNRS, Institut de Chimie Radicalaire, UMR7273, 13397 Marseille Cedex 20, France.
authors: Trang N T
authors: TN
authors: Phan
authors: Aix Marseille Université, 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: D002073:Butanes; D002853:Chromatography, Liquid / Q000379:methods*; D004126:Dimethylformamide; D008970:Molecular Weight; D011092:Polyethylene Glycols / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D012997:Solvents
chemical_list: D002073:Butanes; D011137:Polystyrenes; D012997:Solvents; D011092:Polyethylene Glycols; D004126:Dimethylformamide; C006854:butyl chloride
keywords: Block copolymer; Liquid chromatography under limiting conditions of desorption; Method optimization; Poly(ethylene oxide); Polystyrene