| 학회 | 한국고분자학회 |
| 학술대회 | 2002년 가을 (10/11 ~ 10/12, 군산대학교) |
| 권호 | 27권 2호, p.354 |
| 발표분야 | 특별 심포지엄 |
| 제목 | Morphology Study of Polystyrene-block-Polyisoprene Diblock Copolymer with Narrow Molecular Weight Distribution |
| 초록 | In this study we separate polystyrene-block-polyisoprene diblock copolymers (PS-b-PI) prepared by anionic polymerization into fractions, which have a narrower distribution in molecular weight as well as in chemical composition. The strategy is to use two-dimensional HPLC: reversed phase HPLC to fractionate PI block and normal phase HPLC to fractionate PS block with a minimal effect of the other blocks. PS-b-PI block copolymers could be fractionated into fractions showing a significant variation in average molecular weight as well as in composition. These variations were large enough to show different morphologies for the fractions taken from the same mother block copolymer. In addition, the fractionated PS-b-PI of narrower MWD for both blocks exhibits a larger grain size compared to the mother polymer as observed by small angle x-ray scattering. These results demonstrated the possibility that the fractionated block copolymers could decrease the defects in the self-assembled morphology that has been one of the serious obstacles in the application of the self-assembled morphology in nano-scale. |
| 저자 | 박수진, 류진숙, 장태현 |
| 소속 | 포항공과대 |
| 키워드 | SI diblock copolymer; HPLC fractionation |
