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- W3136252956 abstract "Size exclusion chromatography (SEC) is the most widely employed chromatographic separation technique for characterization of synthetic polymers. SEC separates polymer molecules according to their chain size utilizing size-dependent pore accessibility of polymer molecules. Since the polymer chain size depends on not only molecular weight (MW) but also other molecular characteristics such as composition, chain architecture, and microstructure, SEC cannot separate, for instance, nonlinear homopolymers according to MW or copolymers according to their composition. In contrast to SEC, interaction chromatography (IC) fractionates polymers according to the interaction strength between the polymer molecules and the sorbent. As a result, IC separation is sensitive to chemical nature and MW of polymers unlike the size-sensitive SEC. Furthermore, one can access to the chromatographic critical condition by adjusting the solute interaction strength with the sorbent until the exclusion and interaction contributions to the solute retention are exactly compensated. At the critical condition, polymers of different MW coelute. Therefore liquid chromatography (LC) at the critical condition (LCCC) is a unique tool for LC separation of polymers since the peak dispersion of polymers due to their MW distribution can be suppressed for effective analyses of other molecular characteristics. Recently, polymer separations using two-dimensional LC by various combinations of SEC, IC, or LCCC are increasingly used for the characterization of polymers with multivariate distributions. For effective IC separations, solute interaction strength needs to be controlled judiciously during the elution. For this purpose, either solvent gradient or temperature gradient elution is often used. In this chapter, principles and applications of IC and LCCC separation methods of synthetic polymers are reviewed with an emphasis on the temperature gradient elution method." @default.
- W3136252956 created "2021-03-29" @default.
- W3136252956 creator A5058885652 @default.
- W3136252956 date "2021-01-01" @default.
- W3136252956 modified "2023-10-12" @default.
- W3136252956 title "Temperature gradient interaction chromatography of polymers" @default.
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