| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 봄 (04/09 ~ 04/10, 대전컨벤션센터) |
| 권호 |
34권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Synthesis of pH-sensitive poly(ethylene oxide) -b- poly(1-vinyl imidazole) -b- poly(maleic acid) via transformation reaction |
| 초록 |
We have successfully synthesized water-soluble triblock copolymer exhibiting pH-responsive phase transition behavior via transformation reaction of ω-brominated poly(ethylene oxide) obtained from living anionic ring opening polymerization of ethylene oxide and RAFT radical polymerization of 1-vinyl imidazole and N-phenylmaleimide using AIBN. Using the PEO-based RAFT agent and AIBN as an initiator, RAFT radical polymerization of 1-vinyl imidazole(VI) and N-phenylmaleimide for preparation of block copolymer was performed in DMF at 110 ℃ for 72 h. The resulting triblock copolymer was deimidated by using hydrazine monohydrate with NaOH in DMSO at 120 ℃ for 24 h, followed by precipitating in diethyl ether. 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 triblock copolymer exhibited pH-sensitive phase transition. |
| 저자 |
김근석, 김태환, 이상미, 남주현, 김정순, 김유진, 김정안
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| 소속 |
경희대 |
| 키워드 |
poly(ethylene oxide); PEO; poly(vinylimidazole); PVIm; poly(maleic acid); PMAc; triblock copolymer; anionic polymerization; RAFT; transformation reaction
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| E-Mail |
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