Article
  • Studies on Oxygen Permeation Characteristics of Poly(urethane-g-propylene sulfide) Membranes
  • Kim JH, Kim KY
  • Poly(urethane-g-propylene Sulfide)막의 산소투과특성에 관한 연구
  • 김정학, 김계용
Abstract
The oxygen permeation characteristics of for ester type polyurethane(PU) and poly(urethane-g-propylene sulfide)(PU-g-S) membranes were studied under different permeation conditions. PU-g-S was prepared by anionic graft polymerization. PU was dissolved in dehydrated DMF and NaH was added under nitrogen atmosphere at 0℃. Hydrogens of urethane bonds were substituted by Na+ ions. Diffusion coefficients were obtained from time-lag method. Diffusion and permeation coefficients were increased with increase in temperature of permeation and were independent of pressure. Diffusion coefficient of PU-g-S membrane was 10 times larger than that of PU membrane. Permeability coefficient of PU-g-S membrane for O2 was 8.8×10-10(cm3(STP)·cm/cm2·sec·.cmHg) at 60℃, 300 psi and was 3.7×10-10(cm3(STP)·cm/cm2·sec·cmHg) for N2. Therefore, it was found that PU-g-S membrane had good permselectivity for O2. Grafted copolymer was confirmed by IR and elementary analysis and permeation characteristics were studied in transition temperature by DSC.

에스테르형 폴리우레탄(PU)막과 propylene sulfide를 그라프트시킨 폴리우레탄(PU-g-S)막을 이용하여 산소투과특성을 검토하였다. 폴리우레탄을 DMF에 녹인후 0℃에서 sodium hydride를 사용하여 우레탄결합중의 수소를 Na로 치환시킨 후 음이온중합으로 propylene sulfide를 그라프트시켰다. 확산계수는 time-lag법으로 구했으며 온도상승에 비례하여 확산계수와 투과계수가 증가했으며 압력의존성은 없었다. PU-g-S막의 확산계수는 PU막보다 10배정도 컸으며 산소와 질소의 투과계수는 각각 8.8×10-10(cm3(STP)·cm/cm2·sec·cmHg)과 3.7×10-10(cm3(STP)·cm/cm2·sec·cmHg)으로 산소의 투과계수가 질소의 투과계수보다 3배정도 컸다. 이상의 결과로부터 propylene sulfide가 그라프트된 PU-g-S막 산소에 대한 선택투과성이 좋음을 알았다. 한편, 그라프트공중합체를 IR과 원소분석으로 분석하였다. 또 DSC로 전이영역에서의 투과특성을 고찰하였다.

Keywords:

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1984; 8(2): 98-105

    Published online Apr 25, 1984

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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