| 초록 |
We reported the facile synthesis of Miktoarm star copolymer composed of P3HT and PMMA ((P3HT)2PMMA) using click reaction and anionic polymerization. First, we synthesized PMMA terminated with 1,3,5-tris(bromomethyl)benzene (PMMA-(Br)2) by anionic polymerization, and two bromines were replaced by azides (PMMA-(N3)2). Also, mono-ethynyl-capped P3HT was synthesized by Grignard metathesis polymerization and post end functionalization. Then, click reaction between mono-ethynyl-capped P3HT and PMMA-(N3)2 was performed to synthesize (P3HT)2PMMA. The optical property and thin film morphology of (P3HT)2PMMA were investigated. (P3HT)2PMMA showed the fibril structure in thin film. We also synthesized two linear P3HT-b-PMMAs by click reaction to compare fibril structure of P3HT blocks. We found that the π-π interaction between P3HT arms in (P3HT)2PMMA was strong enough to arrange two P3HT backbone chains in (P3HT)2PMMA to stack one by one along the nanofibril axis. |
