| 초록 |
To apply self-assembly of block copolymers(BCPs) to various fields of study, it is important to control feature size appropriately to their specifications. The most used controlling variables are χ and N. However, due to slow chain dynamics at high molecular weights(MW) and low dependence on these variables, it is hard to control feature size using only these two variables. In this work, we investigated ARB-type BCPs, where the R denotes the short middle random block composed of A and B. We anticipated that the R gives the effect of increased PDI via compositional distribution, leading to an increased domain spacing compared to the AB diBCPs with same MW and PDI. We synthesized ARB-type BCPs and AB diBCPs having similar PDI, and their morphologies were characterized by SEM, TEM, and SAXS. Consequently, ARB-type BCPs exhibited ~ 30 % increase in the domain spacing compared to the AB diBCPs with same MW and PDI. These results were also compared to simulation results. |
