화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터)
권호 43권 2호
발표분야 고분자합성
제목 Synthesis of Poly(4-hydroxystyrene–b-N-vinylamine) Diblock Copolymer by RAFT Polymerization
초록 Poly(N-vinylamine) (PVAm) is a typical addition polymer having a large amount of primary amine groups, but controlled radical polymerization of PVAm have been rarely reported. We synthesized poly(4-hydroxystyrene)–b-poly(N-vinylamine) (PHS-b-PVAm) by Reversible Addition Fragmentation Chain-Transfer (RAFT) polymerization. We use ‘switchable’ RAFT agent to make poly(4-acetoxystyrene)-b-poly(N-vinylformamide) (PAcOS-b-PNVF), a precursor of the desired PHS-b-PVAm. The reactivity of C-S double bond on the switchable RAFT agent could be controlled by protonation and deprotonation of Z group which gives a proper control over the polymerization of both PAcOS and PNVF blocks. Hydrolysis of PAcOS-b-PNVF produces a diblock copolymer of PHS-b-PVAm, which has acidic phonolic moeity on the hydroxystyrene block and basic primary amine on the vinylamine block. The diblock polymer self-assembled in water, forming a spherical nanoparticle.
저자 윤준혁, 김태형, 김상율
소속 KAIST
키워드 RAFT polymerization; pH-response
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