Article
  • Synthesis and Properties of Polyurethane/SAN/LIPNs
  • Cho SM, Kim BK, Shin YJ
  • Polyurethane/SAN LIPN의 합성 및 물성
  • 조성모, 김병규, 신영조
Abstract
Latex interpenetrating polymer networks(LIPNs) of polyurethane (PU) and poly(styrene-co-acrylonitrile) (SAN) were synthesized. Latex composition and acrylonitrile (AN) content in SAN were varied. Particle size was measured by light scattering method and the physical properties of the latex cast films were investigated with a tensile tester, KMTA, and DTA. Particle size increased as content of SAN and AN in SAN were increased. Modulus and strength increased and elongation at break decreased with increasing content of SAN. On the other hand, strength and elongation at break increased with AN content in SAN. DMTA showed due presumably to the increased physical interlockings between PU and SAN LIPNs relative to the conventional PU/SAM blends. DTA measurements do not showed soft segment crystallization with over 50% SAN.

Polyurethane(PU)과 poly(styrene-co-acrylonitrile)(SAN)의 latex interpenetrating polymer network(LIPN)을 LIPN의 조성, SANSO의 acrylonitril(AN)의 함량을 달리하여 제조하였다. 입자 크기는 light scattering method로 측정하였고, 인장시험. DMTA, DTA 등으로 latex cast 박막의 물리적 성질을 조사하였다. Latex의 입자크기는 SAN의 함량과 SAN내의 AN함량이 증가할수록 증가하였다. SAN의 함량이 증가할수록 신율은 줄어들고 탄성률과 인장강도는 증가하였으며, SAN중의 AN 함량의 증가와 더불어 인장강도와 신율이 증가함을 보였다. 또한 DMTA 측정에서는 PU/SAN LIPN이 단일 유리전이온도를 나타내었는데 이는 물리적 가교가 치밀한데 기인한 것으로 해석하였다. DAT 실험에서는 SAN의 함량이 50%이상인 경우 PU soft segment의 결정화 거동을 관찰할 수 없었다.

Keywords: latex interpenetrating polymer networks; polyurethane; poly(styrene-co-acrylonitrile)

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  • 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

  • 1999; 23(5): 739-746

    Published online Sep 25, 1999