| 학회 | 한국고분자학회 |
| 학술대회 | 2003년 봄 (04/11 ~ 04/12, 연세대학교) |
| 권호 | 28권 1호, p.82 |
| 발표분야 | 기능성 고분자 |
| 제목 | Kinetics and Mechanism of Morphological Transition from Lamella to Cylinder Microdomain in Polystyrene-block-poly(ethylene-co-but-1-ene)-block-polystyrene triblock copolymer |
| 초록 | The kinetics and mechanism of morphological transition from non-equilibrium lamella to cylinder microdomain in a polystyrene-block- poly(ethylene-co-but-1-ene)-block-polystyrene (SEBS) triblock copolymer were studied by using time-resolved synchrotron small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and rheology. LAM of PS and PEB block was transformed into the hexagonally-close packing (HEX) of PS cylinders in PEB matrix when the as-cast sample was annealed above 140 oC, which is above the glass transition temperature of the PS block. From the time-resolved SAXS and TEM, the coexistence of the LAM and HEX microdomains was clearly confirmed during the entire process of the order to order transition (OOT) from LAM to HEX, and the lamellar fraction in the coexisting phase decreased with annealing time. It is concluded that at higher temperatures the nucleation and growth of the HEX microdomains from LAM phase result from both interlayer correlation of the modulation and in-layer modulation of LAM layers (2-dimensional growth). On the other hand, at lower temperatures, one-dimensional growth from the in-layer modulation induced the nucleation and growth of HEX microdomains. This work was supported by National RND Program (M1-0214-00-0230) by MOST, the Korea Research Foundation (KRF-2002-05-D00008). |
| 저자 | 정운용;김진곤;Shinichi Sakurai |
| 소속 | 포항공대 화공과;포항공대 화공과;Kyoto institutue of technology |
| 키워드 | block copolymer; order-to-order transition |
