Characterization of polydimethylsiloxane-block-polystyrene (PDMS-b-PS) copolymers by liquid chromatography at critical conditions

Date
2011
Authors
Malik M.I.
Sinha P.
Bayley G.M.
Mallon P.E.
Pasch H.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
In this study, liquid chromatography at critical conditions (LCCC) is used to determine the block lengths and molar masses of polydimethylsiloxane-block- polystyrene copolymers synthesized via atom transfer radical polymerization (ATRP) techniques. In addition, the analysis allows for the determination of the presence of homopolymers in the samples. LCCC at the critical point of polydimethylsiloxane (PDMS) on a reversed phase column allows for the determination of PDMS homopolymer and the length of the polystyrene (PS) block in the block copolymer which elutes in the size exclusion chromatography (SEC) regime under these conditions. The PDMS block length and PS homopolymer can be obtained under normal phase conditions. The results of LCCC are compared with data from conventional SEC.(Figure Presented) © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Description
Keywords
block copolymers, critical adsorption point, liquid chromatography at critical conditions, polydimethylsiloxane, polystyrene, Atom transfer radical polymerization techniques, Block lengths, Critical adsorption point, Critical points, Liquid chromatography at critical conditions, Normal phase, Polydimethylsiloxane PDMS, Polystyrene copolymer, Reversed-phase columns, Adsorption, Atom transfer radical polymerization, Block copolymers, Column chromatography, Copolymerization, Free radical reactions, Gel permeation chromatography, Homopolymerization, Liquids, Microchannels, Plastic products, Polystyrenes, Silicones, Size exclusion chromatography
Citation
Macromolecular Chemistry and Physics
212
12
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