Article
  • Dispersity of Silver Particles in Polyurethane Matrix: Effect of Polyurethane Chemical Structure
  • Im H, Lee H, Kim J
  • 폴리우레탄 구조 변화에 따른 은 입자의 분산 특성
  • 임현구, 이혁수, 김주헌
Abstract
We synthesized various polyurethanes(PU) having different hard segments with different molecular weights of the soft segment to explore the effect of structure on the dispersion of silver particle in the phase of synthesized polyurethanes matrix. The thermal stability was increased by increasing the number of aromatic compound, while the degree of dispersion for silver particle was decreased. Silver particles showed better dispersion in the PU matrix having aromatic compounds when the soft segments were held constant. On the contrary, when the hard segment was held constant, silver particles on the PU matrix having low Mw of soft segment showed better dispersion than high Mw of soft segment because poor chain mobility of low Mw of soft segment restricted re-aggregation of silver particle. A sheet resistance of composite materials showed different aspects. In this case, the inter connection between silver particles was more important than its dispersion. In this study, the NDI-PEG 900/silver particle composite film showed the best thermal stability and electro conductivity.

폴리우레탄의 우수한 기계적 물성에 전기 전도성을 가질 수 있도록 은 입자와의 복합체를 제조하였다. 균일하고 우수한 물성을 나타내기 위해서는 고른 분산성이 중요하게 되는데 폴리우레탄의 hard segment와 soft segment를 바꿔가며 가장 열적 안정성이 뛰어나고 은 입자를 균일하게 분산시킬 수 있는 폴리우레탄의 구조를 파악하였다. 열적 안정성은 방향족 증가와 사슬의 hard segment 비율 증가에 따라 높아짐을 알 수 있었고 분산성에서는 hard segment의 방향족이 포함된 것이 지방족보다 우수한 분산성을 가졌다, 또한 soft segment에 따라서는 낮은 분자량에서 사슬의 mobility로 인해 좋은 분산성을 나타내었다. 하지만 전기 전도성에서는 고른 분산성보다도 입자간의 inter- connection을 이룰 수 있는 형태가 가장 낮은 저항값을 나타내었으며, NDI와 낮은 분자량의 PEG로 이루어진 복합체가 가장 좋은 물성을 나타내었다.

Keywords: polyurethane; dispersion; hard segment; soft segment; sheet resistance

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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

  • 2007; 31(6): 543-549

    Published online Nov 25, 2007

  • Received on Aug 31, 2007
  • Accepted on Oct 17, 2007