Article
  • Blending of Silica Nanoparticles with PBA/PS Core-Shell Baroplastic Polymers
  • Kim MJ, Choi YD, Ryu SW
  • PBA/PS 코어-셸 압력가소성 고분자와 실리카 나노입자의 블렌딩
  • 김민정, 최용두, 류상욱
Abstract
PBA/PS core-shell polymer nanoparticles were synthesized by two stage emulsion polymerization and hybridized with silica nanoparticle by simple mixing in emulsion state and following precipitation into water/methanol mixture dissolving Na2CO3. The stress-strain curve revealed that the elastic modulus was increased with increasing molecular weight of polymer and silica weight fraction but decreased with increasing size of core-shell nanoparticle. Especially, there was a rapid increase of elastic modulus with silica blending. As a result, 6 times higher elastic modulus was observed in PBA/PS core-shell baroplastic sample processed at 25 ℃ under 13.8 MPa for 5 min by blending with 13.0 wt% of silica nanoparticle.

두 단계 에멀젼 중합을 통해 PBA/PS 코어-셸 고분자 나노입자 및 실리카가 함유된 유기-무기 하이브리드 재료를 합성하였다. 실리카 나노입자는 코어-셸 고분자 에멀젼과 혼합되어 Na2CO3가 녹아있는 증류수/메탄올의 혼합용매에 침전되었다. 건조 후 압축성형으로 제조된 시편의 물성평가를 통해 탄성계수는 코어-셸 나노입자의 크기가 작을수록, 분자량이 클수록, 실리카가 많이 첨가될수록 증가함을 확인하였다. 또한 PBA/PS 코어-셸 고분자는 실리카가 13.0 wt% 첨가되었음에도 불구하고 25 ℃, 13.8 MPa, 5분의 조건에서 우수한 압력가소성 특징을 나타내었으며 6배 이상 증가된 탄성계수가 얻어졌다.

Keywords: organic-inorganic hybrid; baroplastic; core-shell; silica nanoparticle; modulus

  • 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

  • 2008; 32(6): 573-579

    Published online Nov 25, 2008

  • 10.7317/pk.
  • Received on Jul 5, 2008
  • Revised on Nov 30, -0001
  • Accepted on Aug 2, 2008

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