| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 가을 (10/08 ~ 10/09, 광주과학기술원 오룡관) |
| 권호 |
34권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Synthesis of pH-sensitive poly(ethylene oxide) -b- poly(1-vinyl imidazole) and its application |
| 초록 |
We have successfully synthesized water-soluble block copolymer exhibiting pH-responsive phase transition behavior via transformation reaction from anionic to RAFT radical. We first synthesized ω-brominated poly(ethylene oxide) by living anionic ring opening polymerization of ethylene oxide, followed by synthesis of PEO-based RAFT agent. RAFT radical polymerization of 1-vinyl imidazole(VI) for preparation of block copolymer was performed in DMF at 110 ℃ for 72 h. After precipitating in diethyl ether, unreacted RAFT agent was removed via selective precipitation in THF. All the products were dried in vaccum oven at room temperature for at least 48 h and then characterized by 1H-NMR and size exclusion chromatographic analysis. The resulting block copolymer exhibited pH-sensitive phase transition. PEO -b- PVIm was used as a polymeric stabilizer for preparation of nano-sized iron oxide particles. |
| 저자 |
김근석1, 김태환1, 최진희1, 조영준1, 김정순1, 남주현1, 이정화1, 김유진1, 김훈태2, 김정안1
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| 소속 |
1경희대, 2서강대 |
| 키워드 |
PEO -b- PVIm; pH-resposive; transformation reaction; RAFT polymerization; nanoparticle; iron oxide nanoparticle
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| E-Mail |
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