Article
  • Synthesis of Thermally Expandable Microspheres Using Ethoxylated Trimethylolpropane Triacrylates as Crosslinking Agents
  • MiJung Rheem, Jae Il So, Ji Young Jung, and Sang Eun Shim

  • Department of Chemistry & Chemical Engineering, Inha University, Incheon 22212, Korea

  • Ethoxylated Trimethylolpropane Triacrylate를 가교제로 사용한 열팽창 캡슐 제조
  • 임미정 · 소재일 · 정지영 · 심상은

  • 인하대학교 화학 및 화학공학 융합대학원

Abstract

Thermally expandable microspheres are synthesized by suspension polymerization using three ethoxylated trimethylolpropane triacrylates with different molecular weights as crosslinking agents. The polymeric shell is made of acrylonitrile and methacrylonitrile and iso-octane is encapsulated as blowing agent. As the crosslinking of shell increases, the shape of the microspheres changes from spherical to bumpy due to different local crosslinking density. The expansion behavior was influenced by types and amounts of crosslinking agents. Average size and thermal stability of expandable microspheres are increased by increasing the amount of crosslinking agent. The microspheres prepared with ethoxylated (6) trimethylolpropane triacrylate to achieve optimum crosslinking results in an excellent expansion performance.


자량이 다른 세가지의 ethoxylated trimethylolpropane triacrylate를 가교제로 사용한 현탁 중합을 통하여 열팽창 캡슐을 제조하였다. 고분자 쉘은 아크릴로나이트릴과 메타크릴로나이트릴로 구성되었으며 발포제인 아이소옥탄을 캡슐화하였다. 쉘의 가교정도가 증가함에 따라 국부의 가교밀도 차이에 의하여 캡슐의 형태는 구형에서 울퉁불퉁하게 변화하였다. 팽창 특성은 가교제의 종류와 함량에 의해 영향을 받았다. 캡슐의 입경은 가교제의 양이 증가함에 따라 증가하였다. 최적의 가교도를 지닌 ethoxylated (6) trimethylolpropane triacrylate를 사용한 캡슐의 열팽창 특성이 가장 우수하였다.


Keywords: thermally expandable microspheres, suspension polymerization, trimethylolpropane triacrylate, crosslinking agent

  • 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

  • 2018; 42(6): 1068-1076

    Published online Nov 25, 2018

  • 10.7317/pk.2018.42.6.1068
  • Received on Jul 10, 2018
  • Revised on Aug 16, 2018
  • Accepted on Aug 17, 2018

Correspondence to

  • Sang Eun Shim
  • Department of Chemistry & Chemical Engineering, Inha University, Incheon 22212, Korea

  • E-mail: seshim@inha.ac.kr