| 초록 |
StyroluxTM is a commercial polymer, known to be star-shaped block copolymers of polystyrene (PS) and polybutadiene (PB) prepared by anionic polymerization and subsequent linking of two different PS-b-PB. Therefore it is a complex mixture of star-shaped diblock copolymers with varying number of arms of two different kinds and linear precursors. Size exclusion chromatography (SEC) is the most widely used method in characterization of polymers, but it is not good enough to characterize such a complex polymer with multivariate distributions in chain architecture and composition. In this study, we carried out 2D-LC analyses to map the multivariate distribution of Styrolux by combining various HPLC methods; normal phase LC x SEC, reversed phase LC x SEC, normal phase LC x LCCC at the CAP of PS and reversed phase LC x LCCC at the CAP of PB. By comparing the four 2D-LC chromatograms, most of the components in the Styrolux could be sorted out. |
