Article
  • Synthesis of New Diamine and Polymerization of Polyetherimide for Improving Melt Process
  • Wan Gi Seo*,#, No Kyun Park*,#, Yuri Jeong*,***, Ho Sub Kim**, Sang Kyun Kim**, Young Kyo Son**, Sang Min Song**, Yun Ho Kim*,***† , and Jong Chan Won*,***†

  • *Advanced Functional Polymers Research Center, Korea Reserch Institute of Chemical Technology
    Gajeongro 141, Yuseong, Daejeon 34114, Korea
    **Kolon Industries, Inc., Magokdong-ro 110, Gangseo-gu, Seoul 07793, Korea
    ***KRICT School, University of Science and Technology (UST), Gajeongro 217, Yuseong, Daejeon 34113, Korea

  • 폴리에테르이미드 용융중합 공정개선을 위한 신규 디아민 합성 및 중합
  • 서완기*,# · 박노균*,# · 정유리*,*** · 김호섭** · 김상균** · 손영교** · 송상민** · 김윤호*,***† · 원종찬*,***†

  • *한국화학연구원 고기능고분자연구센터, ** 코오롱인더스트리, ***과학기술연합대학원대학교 KRICT스쿨

Abstract

Melt process of polyetherimide (PEI) has a difficulty to precisely control mixing ratio of monomers, which results in failure of production on an industrial scale. Especially, a typical diamine monomer obstructs the feeder of the hot extruder due to its low melting point (mp) of 64 oC. In this work, we suggest that a novel diamine monomer, DABI, can be substituted for the conventional monomer. The molecular structure of DABI was designed with the A-B-A structure with amide linkage, where A was m-PDA and B was BPADA, and was identified by structural analysis (1H NMR and FTIR). DABI showed a high yield of 98% in synthesis process and a high mp of 152 oC in thermal analysis (DSC). Finally, we obtain high molecular weight of PEI via melt process with DABI, which indicates that DABI can solve the problem with imbalance in the mixing ratio in melt process


폴리에테르이미드(PEI)의 용융중합은 단량체의 양을 정밀하게 조절하기 어려워 동일한 품질을 양산하기 힘들다는 큰 한계점이 있다. 특히, 기존 디아민 단량체인 m-PDA는 낮은 융점(64 oC)으로 인해 압출기의 투입구에서 용융되어 혼합비의 불균형을 초래하였다. 본 연구에서는 문제를 개선할 수 있는 신규 디아민 단량체 DABI를 소개한다. DABI는 98%의 높은 수득률로 제조되었으며 부가 반응이 없는 A-B-A 다이머 구조이다. 또한 DABI는 152 oC의 높은 융점을 가지고 있는 것으로 나타났다. 최종적으로 DABI를 이용한 용융중합에서 높은 분자량을 가지는 PEI를 얻을 수 있었으며, 이러한 결과는 합성한 신규단량체 DABI가 혼합비 불균형 문제를 해소하고 공정을 개선하였음을 보여준다


Keywords: polyimide, polyetherimide, extruder, melt polymerization

  • 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

  • 2020; 44(2): 233-239

    Published online Mar 25, 2020

  • 10.7317/pk.2020.44.2.233
  • Received on Jan 16, 2020
  • Revised on Jan 28, 2020
  • Accepted on Jan 28, 2020

Correspondence to

  • Yun Ho Kim*,***, and Jong Chan Won
  • *Advanced Functional Polymers Research Center, Korea Reserch Institute of Chemical Technology
    Gajeongro 141, Yuseong, Daejeon 34114, Korea

  • E-mail: yunho@krict.re.kr, jcwon@krict.re.kr