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Title Thermal field-flow fractionation for the investigation of the thermoresponsive nature of star and linear polystyrene
Date 08.11.2018
Number 54353
Abstract Thermal field–flow fractionation (ThFFF) is a powerful alternative to commonly used column–based techniques to characterize star polymers according to their solution behavior, as well as different molecular parameters, such as size and composition. This study demonstrates, for the first time, that ThFFF is an effective tool to investigate the thermoresponsive nature of polymers. ThFFF analysis of linear and star polystyrene in THF, dimethylacetamide, and cyclohexane shows that star polymers are more temperature–sensitive than their linear analogs regarding their sizes in solution. This temperature sensitivity influences the retention behavior in ThFFF. Moreover, it is demonstrated that the thermodynamic quality of the solvent significantly influences both the thermal diffusion coefficient and the temperature–sensitive nature of the samples. Finally, changing the thermodynamic quality of the solvent causes deviations in determining the number of chain ends from ThFFF data.
Publisher Macromolecular Chemistry and Physics
Identifier
Citation Macromolecular Chemistry and Physics 219 (2018) ID1899417
DOI https://doi.org/10.1002/macp.201800417
Authors Greyling, G. ; Lederer, A. ; Pasch, H.
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