Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Syntheses of Colorless and Transparent Copolyimides and Comparison of the Properties of Their Copolyimides

무색 투명 폴리이미드 공중합체의 합성 및 물성 비교

  • Ju, Jieun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology) ;
  • Chang, Jin-Hae (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
  • 주지은 (금오공과대학교 고분자공학과) ;
  • 장진해 (금오공과대학교 고분자공학과)
  • Received : 2014.07.04
  • Accepted : 2014.08.28
  • Published : 2015.03.25
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Abstract

Two series of copolyimides (Co-PIs) were prepared by reacting 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 1,2,4,5-benzentetra carboxylic dianhydride (pyromellitic dianhydride) (PMDA), as dianhydrides based on 4,4'-biphthalic anhydride (BPA) and 2,2'-bis(trifluoromethyl)benzidine (TFB) by using thermal- and chemical imidizations. Co-PIs films with different dianhydride monomer compositions were compared in terms of their thermal properties and optical transparencies. The addition of PMDA was more effective than the addition of 6FDA for improving the thermal properties. Meanwhile, 6FDA is more effective in optical transparencies.

4,4'-Biphthalic anhydride(BPA)와 2,2'-bis(trifluoromethyl) benzidine(TFB)의 구조에 서로 다른 무수물인 4,4'-(hexafluoroisopropylidene) diphthalic anhydride(6FDA)와 1,2,4,5-benzentetra carboxylic dianhydride(pyromellitic dianhydride) (PMDA)를 각각 반응시켜 열적 및 화학적 이미드화 반응을 통해 두 가지 시리즈의 폴리이미드 공중합체(copolyimide, Co-PI)를 합성하였다. 합성한 Co-PI를 각각 다른 두 가지 무수물 단량체의 조성에 따라 열적 성질 및 광학적 투명성을 서로 비교 분석하였다. 열적 성질을 증가시키기 위해서는 6FDA보다는 PMDA가 더 효과적이었으나, 광학 투명성에서는 오히려 6FDA가 더 효과적이었다.

Keywords

References

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