Investigation of block copolymer micellization by high-performance size-exclusion chromatography

Investigation of block copolymer micellization by high-performance size-exclusion chromatography

The formation and decomposition of micelles of the three‐block copolymer polystyrene‐block‐poly(ethene‐stat‐butene)‐block‐polystyrene (Kraton G 1652, Shell) were investigated by high‐performance size‐exclusion chromatography in a mixed solvent dioxan–heptane. The association equilibrium may be shift...

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Veröffentlicht in:Journal of applied polymer science 1985-01, Vol.30 (1), p.143-150
Hauptverfasser: SPACEK, P, KUBIN, M
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Surface properties
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KUBIN, M
description The formation and decomposition of micelles of the three‐block copolymer polystyrene‐block‐poly(ethene‐stat‐butene)‐block‐polystyrene (Kraton G 1652, Shell) were investigated by high‐performance size‐exclusion chromatography in a mixed solvent dioxan–heptane. The association equilibrium may be shifted from the pure unimer to pure micelles by changing the composition of the mobile phase, and also (at constant composition) by a change in temperature. The shape of the chromatograms observed under conditions of comparable equilibrium concentrations of both species may be explained by the disturbance and reestablishment of the association equilibrium during separation in the chromatographic column. Experiments with changing flow rate show the dominating effect of degrading separation efficiency with increasing linear velocity of the mobile phase.
doi_str_mv 10.1002/app.1985.070300111
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The association equilibrium may be shifted from the pure unimer to pure micelles by changing the composition of the mobile phase, and also (at constant composition) by a change in temperature. The shape of the chromatograms observed under conditions of comparable equilibrium concentrations of both species may be explained by the disturbance and reestablishment of the association equilibrium during separation in the chromatographic column. 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Appl. Polym. Sci</addtitle><description>The formation and decomposition of micelles of the three‐block copolymer polystyrene‐block‐poly(ethene‐stat‐butene)‐block‐polystyrene (Kraton G 1652, Shell) were investigated by high‐performance size‐exclusion chromatography in a mixed solvent dioxan–heptane. The association equilibrium may be shifted from the pure unimer to pure micelles by changing the composition of the mobile phase, and also (at constant composition) by a change in temperature. The shape of the chromatograms observed under conditions of comparable equilibrium concentrations of both species may be explained by the disturbance and reestablishment of the association equilibrium during separation in the chromatographic column. 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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Surface properties
title Investigation of block copolymer micellization by high-performance size-exclusion chromatography
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