| 초록 |
Up to now, a phase evolution of triblock terpolymers upon solvent vapor annealing still remains ambiguous due to different affinity of each block with the annealing solvent. The affinity difference should result in dissimilarity in the swollen volume and changes of volume fraction of each block in a triblock terpolymer. In this study, the phase behavior of PS-b-PI-b-PMMA triblock terpolymer thin film upon solvent vapor annealing is investigated under controlled vapor pressue of various solvents with in-situ film thickness measurement system. The morphologies are analyzed by small angle X-ray scattering and transmission electron microscopy (TEM). Swollen volume of each block in triblock terpolymer can be estimated by thickness variation during the solvent vapor annealing. The order-disorder transition, effect of solvent affinity and structual analysis of well-ordered microphases are explained with respect to thermodynamic (volume fraction, χN) and kinetic (mobility) properties. |
