| 초록 |
In this study, we characterized the multiple phase transition composed of enthalpic-driven order-to-disorder (ODT) and entropic-driven closed-loop using the miscible blends of binary block copolymer (BCP) systems. The phase transitions of BCP blends, composed of a polystyrene-b-poly (n-butyl methacrylate) (PS-b-PnBMA) and a deuterated polystyrene-b-poly (n-hexyl methacrylate) (dPS-b-PnHMA), were measured by small-angle x-ray scattering (SAXS), depolarized light scattering (DPLS), and transmission electron microscopy (TEM). Three individual transitions, like enthalpic-driven ODT, entropic-driven lower disorder-to-order transition (LDOT), and upper order-to-disorder transition (UODT), were identified in specific volume fraction of (d)PS (0.511 ＜ f ＜ 0.514) in the BCP blends. Additionally, unlike ODT, closed-loop transition (LDOT, UODT) was vanished upon pressure which could be applied in pressure-sensitive application as a baroplastic. |
