Size-exclusion and high-performance precipitation liquid chromatography of styrene-acrylonitrile copolymers

Determination of the compositional heterogeneity of polydisperse polymer samples by the coupling of size-exclusion chromatography and thermal field-flow fractionation

“…In this case elution volumes are usually independent of the type of packing material used. This mode of operation has been indicated by Ol~ckner and co-workers [14][15][16] as high-performance precipization liquid chromatography (HPPLC). However, for different experimental conditions also adsorption mechanisms can determine the extent of fractionation [17][18][19][20].…”

“…However, for different experimental conditions also adsorption mechanisms can determine the extent of fractionation [17][18][19][20]. The combination of SEC with gradient HPLC has been used for the analysis of S-methylmethacrylate (MMA) [6,13,21] and S-acrylonitrile (AN) copolymers [14][15][16].…”

Copolymer analysis

“…Glockner et al [75] developed high-performance precipitation lIqUId chromatography (HPPLC) for separation of PSAN copolymers according to chemical composition. HPPLC is a gradient technique based on solubility difference with a suitable solvent non-solvent combination.…”

End‐Group Selectivity of Low‐Molecular‐Weight Polystyrenes on a Carbon‐Clad Zirconia Stationary Phase in Reversed‐Phase HPLC

“…[10,11] Unlike size exclusion chromatography (SEC), the reversed-phase method utilises the differing selectivities of association between the solute and the stationary phase surface. Whether these interactions are based on adsorption or partitioning is immaterial, but what is important is that the differences between molecules with different chemical structures can be identified based upon their interaction and hence retention on the stationary phase surface.…”