Article
  • Synthesis and Characteristics of Highly Oil-adsorptive Expanded Polyurethane
  • Lee YH, Kim W, Kim W
  • 고흡유성 발포 폴리우레탄의 합성과 특성
  • 이용훈, 김옥, 김원호
Abstract
Oil-absorptive expanded polyurethane(EPU) was prepared with a lypophilic polyol, polypropyleneglycol(PPG) as the soft segment, and toluenediisocyanate(TDI)and H2O as the hard segment. PPGs having various average molecular weights(Mn: 1000, 2000, 3000) were employed to investigate that the soft segment content was consequent on the oil-absroptivity and the mechanical properties of the EPUs. As Mn of PPG was decreased from 3000 to 1000, the oil-absroptivity and the tensile strength of the EPUs increased from 1460 to 3010% and from 0.26 to 0.55kgf/cm2 respectivity. As the hard segment content ratio, γ([NCO]/[OH])was increased from 1.0 to 1.2, the tensile strength of the EPUs increased from 0.56 to 0.95 kgf/cm2, dut to the formation of allophanate and/or biuret bondings. However, as the surfactant(S-A) content was increased frem 1.0 to 2.5 pbw, the oil-absorptivity was decreased from 3634 to 3312% due to the formation of closed cell structures.

흡유성이 우수한 발포 폴리우레탄(EPU)을 제조하기 위하여 soft segment로는 친유성 polyo인 polyprolyleneglycol(PPG)를 사용하고 hard segment로는 toluenediisocyanate(TDI)와 H2O를 사용하였다. Soft segment함량이 흡유성과 발포체의 기계적 특성에 미치는 영향을 조사하기 위하여 PPG평균 분자량 (Mn 1000, 2000, 3000)에 따라 one-shot법으로 EPU를 제조한 결과 PPG 평균분자량이 3000에서 1000으로 감소할수록 흡유량과 인장강도는 각각 1460%에서 3010%, 0.26kgf/cm로 동시에 증가하였다. Hard segment 함량비인 (isocyanate index, γ=[NCO]/[OH]) γ이 1.0에서 1.2로 증가할수록 allophanate와 biuret 결합 형성에 기인하여 EPU의 인장강도가 0.56kgf/cm에서 0.95kgf/cm로 증가하였으나, surfactant(S-A)의 함량은 1.0pbw에서 2.5pbw로 증가할수록 closed cell 구조의 형성으로 인하여 흡유량이 3634%에서 3312%로 감소됨을 알 수 있었다.

Keywords: oil absrotion; expanded polyurethane; cell structure; polyol; isocyanate

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2000; 24(2): 149-158

    Published online Mar 25, 2000