Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Preparation and Characterization of Plasticized Poly(vinyl chloride)-g-Poly(oxyethylene methacrylate) Graft Copolymer Electrolyte Membranes

가소화된 Poly(vinyl chloride)-g-Poly(oxyethylene methacrylate) 가지형 고분자 전해질막 제조 및 분석

  • Seo, Jin-Ah (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Koh, Jong-Kwan (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Koh, Joo-Hwan (Department of Chemical and Biomolecular Engineering, Yonsei University) ;
  • Kim, Jong-Hak (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • 서진아 (연세대학교 화공생명공학과) ;
  • 고종관 (연세대학교 화공생명공학과) ;
  • 고주환 (연세대학교 화공생명공학과) ;
  • 김종학 (연세대학교 화공생명공학과)
  • Received : 2011.06.28
  • Accepted : 2011.08.03
  • Published : 2011.09.30
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Abstract

Poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) graft copolymer was synthesized via atom transfer radical polymerization (ATRP) and used as an electrolyte for electrochromic device. Plasticized polymer electrolytes were prepared by the introduction of propylene carbonate (PC)/ethylene carbonate (EC) mixture as a plasticizer. The effect of salt was systematically investigated using lithium tetrafluoroborate ($LiBF_4$), lithium perchlorate ($LiClO_4$), lithium iodide (LiI) and lithium bistrifluoromethanesulfonimide (LiTFSI). Wide angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC) measurements showed that the structure and glass transition temperature ($T_g$) of polymer electrolytes were changed due to the coordinative interactions between the ether oxygens of POEM and the lithium salts, as supported by FT-IR spectroscopy. Transmission electron microscopy (TEM) showed that the microphase-separated structure of PVC-g-POEM was not greatly disrupted by the introduction of PC/EC and lithium salt. The plasticized polymer electrolyte was applied to the electrochromic device employing poly(3-hexylthiophene) (P3HT) conducting polymer.

Poly(vinyl chloride)-g-poly(oxyethylene methacrylate) (PVC-g-POEM) 가지형 공중합체를 원자전달라디칼 중합을 통해 합성하여 전기변색소자의 전해질에 적용하였다. 가소화된 고분자 전해질은 가소제로서 propylene carbonate (PC)/ethylene carbonate (EC) 혼합물을 도입하여 제조하였으며, Lithium tetrafluoroborate ($LiBF_4$), lithium perchlorate ($LiClO_4$), lithium iodide (LiI) and lithium bistrifluoromethanesulfonimide (LiTFSI)를 사용하여 염의 종류에 따른 영향을 조사하였다. 광각 x-선 산란(WAXS)과 시차주사 열량법(DSC) 측정 결과 고분자 전해질의 구조와 유리전이온도($T_g$)가 변하였고, 이는 POEM 내의 에테르의 산소와 리튬염 사이의 상호작용으로 인해 변했다는 것을 FT-IR 분광법을 통하여 확인하였다. 투과전자현미경(TEM) 측정 결과 PVC-g-POEM 가지형 공중합체의 미세상분리 구조가 PC/EC와 리튬염의 도입에도 변하지 않는 것을 관찰하였다. 가소화된 고분자 전해질은 poly(3-hexylthiophene) (P3HT) 전도성 고분자를 이용한 전기변색소자에 적용되었다.

Keywords

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