• Synthesis and Characterization of Polyacrylate Derivatives Having Protected Isocyanate Groups and Fluorinated Alkyl Groups
  • Kim WS, Kim MW, Jung EC, Baek CH, Park LS, Kang IK, Park SY
  • 보호된 이소시아네이트기와 불소화 알킬기를 가지는 아크릴계 고분자의 합성과 특성
  • 김우식, 김민우, 정은천, 백창훈, 박이순, 강인규, 박수영
Abstract
The copolymerizations of 2-fluorohexylethyl acrylate (FA) with 2-(o-(1-'methylpropylidenamino)carboxyl amino) ethyl methacrylate (MEM) with different molar ratios of the two monomers were carried out in methyl ethyl ketone using α,α',-azobisisobutyronitrile as an initiator to synthesize water repellent polyacrylate derivatives with protected isocyanate groups. The contents of FA and MEM in the copolymers were analyzed by NMR. The monomer reactivity ratios of MEM (1) and FA (2) were determined by Kelen-Tudos plot as follows : r1=1.59 and r2=0.50. The number-average molecular weights of the copolymers were in the range of 39400 to 72400 and the polydispersity indexes were about 1.5. The protected isocyanate groups in the copolymers were converted into isocyanate groups above 150 ℃. The contact angle of the copolymer with 65 mol% of FA for water was about 95 °.

보호된 이소시아네이트기를 가지는 발수성 아크릴계 고분자를 합성하기 위해 개시제로 α,α'-아조비스이소부틸로니트릴을 사용하여 2-fluorohexylethyl acrylate (FA)와 2-(o-(1-'methylpropylidenamino)carboxyl amino) ethyl methacrylate (MEM)를 몰비를 변화시키면서 메틸 에틸 케톤 중에서 공중합하였다. 합성한 공중합체중의 MEM과 FA의 함량을 NMR로 분석하였다. 이 결과를 이용하여 Kelen-Tudos 플로트에 의해 MEM (1)과 FA (2)의 단량체 반응성비를 구하였다. 그 결과 r1=1.59였고 r2=0.50였다. 이들 고분자의 수평균분자량은 39400에서 72400사이에 있었고 다분산 지수는 대략 1.5정도였다. 그 고분자중의 보호된 이소시아네이트기는 150 ℃이상의 온도에서 이소시아네이트기로 재생되었다. FA를 65 mol% 함유하는 고분자의 물에 대한 접촉각은 95 °정도였다.

Keywords: protected isocyanate group; fluoroalkyl group; water repellent polyacrylate derivative; reactivity ratio; contact angle

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
  • Indexed in SCIE

This Article

  • 2003; 27(4): 364-369

    Published online Jul 25, 2003

  • Received on Apr 25, 2003
  • Accepted on Jun 18, 2003