NDLI: Molar mass effects in reversed-phase gradient polymer-elution chromatography of oligomers

Content Provider	Springer Nature Link
Author	Philipsen, H. J. A. Klumperman, B. Leermakers, F. A. M. Wubbe, F. P. C. German, A. L.
Copyright Year	2002
Abstract	The dependence on molar mass of the retention of oligomers in reversed-phase gradient polymer-elution chromatography (RP GPEC) has been investigated. To this end a variety of oligomer series, including polystyrene (PS) and amorphous polyesters (PE) were chromatographed using different non-solvent-solvent (NS-S) mobile phases and at different temperatures. Sigmoidally shaped curves were usually obtained for plots of amount (%) of S against 1/√ (molar mass) but the exact shape varied from almost linear to very convex. Increasing the temperature led to increased dependence of retention on the molar mass; this can be ascribed to a decrease in Flory-Huggins interaction parameters. Changing the NS-S system substantially affects the shape of the curves, but the effect is different for different oligomer series. From results from isocratic measurements for PS and a PE it was found that the effect of experimental conditions can be ascribed to the relative contributions to retention of both end groups and of the monomer repeat units. Because these contributions are affected to different extents by chromatographic conditions, changing these conditions also affects the shape of the plot of the amount of S against 1/√ (molar mass).
Starting Page	533
Ending Page	540
Page Count	8
File Format	PDF
ISSN	00095893
Journal	Chromatographia
Volume Number	55
Issue Number	9-10
e-ISSN	16121112
Language	English
Publisher	Vieweg Verlag
Publisher Date	2002-01-01
Publisher Place	Wiesbaden
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Column liquid chromatography Gradient elution Polymers Dependence of retention on molar mass Analytical Chemistry Organic Chemistry Pharmacy Biochemistry Plant Sciences Measurement Science, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Analytical Chemistry Biochemistry Clinical Biochemistry

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