| 초록 |
The reduction of domain sizes of block copolymer thin films has attracted attention. Especially, PS-b-PMMA is widely used in thin films because PMMA block is easily removed by UV irradiation. Total segment number (N) is one of the factor that can control the self-assembly of block copolymer. It is possible to create small domain sizes by decreasing the N of block copolymer. However, the incompatibility between two blocks is too weak for microphase separation when N is too small. Here, we are trying to make the block copolymer which has a propensity to form columnar structures via π- π interactions. Star-shaped PMMA-b-PS will be synthesized by using Hexa-peri-hexabenzocoronenes (HBCs) as a core. For this purpose, 6 hydroxyl groups on HBCs will be replaced with bromine groups by the reaction with BIBB that is the initiation site of ATRP for PS and PMMA. We characterized that HBCs by NMR, MALDI-TOF and GPC. The morphologies of this block copolymer will be investigated. |
