B. Klumperman et al., A QUALITATIVE STUDY TO THE INFLUENCE OF MOLAR-MASS ON RETENTION IN GRADIENT POLYMER ELUTION CHROMATOGRAPHY (GPEC), Macromolecular symposia, 110, 1996, pp. 1-13
Gradient Polymer Elution Chromatography (GPEC) appears to be a powerfu
l method for the determination of chemical composition distributions (
CCD) of high molar mass copolymers. In order to perform these experime
nts, molar mass dependence of the retention time must be minimized. It
is shown that variation in solvent and non-solvent strength is a powe
rful method for adjusting the molar mass dependence. There appears to
be a relation between molar mass dependence of retention behavior in G
PEC on one hand and solubility under critical solvent conditions on th
e other hand. This phenomenon can be explained qualitatively from the
important precipitation/redissolution mechanism in GPEC.