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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of pH-responsive Diblock Copolymer poly(4-hydroxystyrene–b-N-vinylamine) by using RAFT polymerization

등록일
2017년 8월 23일 20시 37분 06초
접수번호
1316
발표코드
POLY.P-19 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 20일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
Polymer Chemistry
저자 및
공동저자
Jun Hyok Yoon, Sang Youl Kim1,*
Chemistry, Korea Advanced Institute of Science and Technology, Korea
1Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
Poly(N-vinylamine) (PVAm) an interesting polymer which is the simplest amine containing polymer. However, synthesis of PVAm is challenging problem, the monomer can undergoes tautomeric imine and forming undesired complex dondensates. So, there have been few reports about synthesis of PVAm through controlled radical polymerization. We synthesized poly(4-hydroxystyrene–b-N-vinylamine) (PHS-b-PVAm) by using Reversible Addition Fragmentation Chain-Transfer (RAFT) polymerization. We use ‘switchable’ RAFT agent to make poly(p-acetoxystyrene-b-N-vinylformamide) (PAcOS-b-PNVF), the precursor of PHS-b-PVAm, in which reactivity of the active C-S double bond on thiocarbonyl group, by protonation/deprotonation of Z group of RAFT agent. This agent gives unusual, good control over the polymerization of both PAcOS and PNVF block. Hydrolysis of PAcOS-b-PNVF gives diblock polyampholyte PHS-b-PVAm which has acidic phonolic moeity on hydroxystyrene block and basic primary amine on vinylamine block. The resulting polymer self-assembled in water, forming spherical micelle nanoparticles. Also, it shows pH-responsive character for both acidic and basic condition.

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