Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Synthesis of Low Molecular-weight Poly (Propylene Carbonate)-Poly (Ethylene Glycol) Block Copolymers through $CO_2$/Propylene Oxide Copolymerization

이산화탄소/프로필렌 옥사이드 공중합을 통한 저분자량 폴리(프로필렌 카보네이트)-폴리(에틸렌 글리콜) 블록 공중합체의 합성

  • Lee, Sang-Hwan (Department of Molecular Science and Technology, Ajou University) ;
  • Cyriac, Anish (Department of Molecular Science and Technology, Ajou University) ;
  • Jeon, Jong-Yeob (Department of Molecular Science and Technology, Ajou University) ;
  • Lee, Bun-Yeoul (Department of Molecular Science and Technology, Ajou University)
  • 이상환 (아주대학교 분자과학기술학과) ;
  • ;
  • 전종엽 (아주대학교 분자과학기술학과) ;
  • 이분열 (아주대학교 분자과학기술학과)
  • Received : 2011.07.14
  • Accepted : 2011.09.07
  • Published : 2011.09.30
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Abstract

We synthesized low molecular-weight polymers bearing hydrophobic and hydrophilic parts in a chain through $CO_2$/propylene oxide copolymerization. When hydrophilic poly (ethylene glycol) bearing -OH group (s) at the end group (s) was added as a chain transfer agent in the $CO_2$/propylene oxide copolymerization catalyzed by a highly active catalyst, block polymers were formed. If poly (ethylene glycol) (PEG) bearing -OH group only at an end was fed, PEG-block-PPC diblock copolymer was obtained. When PEG bearing -OH group at both ends was fed, PPC-block-PEG-block-PPC triblock copolymer was obtained. We confirmed formation of block copolymers by $^1H$-NMR spectroscopy and GPC studies.

이산화탄소/프로필렌 옥사이드 공중합을 통하여 고분자 사슬 내에 친수성기와 소수성기가 공존하는 저분자량의 블록 공중 합체를 합성하였다. 고활성의 촉매를 사용한 이산화탄소/프로필렌 옥사이드 공중합 반응에 단말기로 -OH기를 갖는 폴리(에틸렌 글리콜)(PEG)을 분자량 조절제로 투입하여 블록 공중합체를 합성하였다. 단말기 한쪽 끝에만 -OH기를 갖는 폴리(에틸렌 글리콜)을 투입하였을 때는 PEG-block-PPC (폴리(프로필렌 카보네이트)) 다이블록 공중합체가 얻어지고, 단말기 양쪽 끝 모두 -OH기를 갖는 폴리(에틸렌 글리콜)을 투입하였을 때는 PPC-block-PEG-block-PPC 트리블록 공중합체가 얻어진다. 제조된 블록 공중합체는 $^1H$-NMR 스펙트럼을 통하여 구조 분석을 하였고 GPC를 통하여 분자량을 측정하였다.

Keywords

References

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