Improving chromatographic separation of polyolefins on porous graphitic carbon stationary phases: effects of adsorption promoting solvent and column length.

ABSTRACT: The chromatographic separation of complex polyolefins on porous graphitic carbon stationary phases is strongly influenced by the composition of the mobile phase. Of particular interest is the effect of the chemical structure of the adsorption promoting solvent as this component of the mobile phase determines the adsorption-desorption behavior of the polyolefin molecules. In a systematic study, alkyl alcohols and linear alkanes are used as adsorption promoting solvents and the effect of the molecules' carbon chain length on chromatographic resolution is investigated. As representative examples, solvent gradient interaction chromatography experiments on polypropylene stereoisomers and ethylene-co-1-octene copolymers are presented. In a further study, the effect of increasing chromatog

SUBMITTER: Ndiripo A 

PROVIDER: S-EPMC9053593 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature