Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Polyimide Films Using Dianhydride Containing Ester Linkages and Various Amine Monomers

에스터기를 가지는 무수물과 다양한 아민 단량체를 이용한 폴리이미드 필름

  • Choi, Chang Hwon (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Chang, Jin-Hae (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology)
  • 최창훤 (금오공과대학교 에너지융합소재 공학부) ;
  • 장진해 (금오공과대학교 에너지융합소재 공학부)
  • Received : 2013.04.15
  • Accepted : 2013.06.25
  • Published : 2013.09.25
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Abstract

Hydroquinone bis(trimellitic anhydride) (HQ-TA) was synthesized from trimellitic anhydride chloride and hydroquinone. Poly(amic acid)s (PAAs) were synthesized by reacting a HQ-TA with six different diamines, which were cyclized to yield polyimides (PIs) containing ester linkages by chemical- and thermal-imidization methods. The various PIs were synthesized from structurally different aromatic diamines. The glass transition temperatures ($T_g$) were in the range of 167-$215^{\circ}C$, and the decomposition temperatures (${T_D}^i$) were in the range of $364-451^{\circ}C$. The maximum improvements in coefficient of thermal expansion (CTE) and barrier to oxygen permeation were observed in PIs using TFB (3.23 $ppm/^{\circ}C$) and 4,4-ODA (< $10^{-2}cc/m^2/day$), respectively. The PI films possessed a transmittance of 65-89% at 500 nm and had a yellowish color with a yellow index (YI) of 3.01-69.52.

Trimellitic anhydride chloride와 hydroquinone을 이용하여 hydroquinone bis(trimellitate anhydride)(HQ-TA)를 합성하였다. 합성된 HQ-TA와 6가지의 다양한 디아민들을 사용하여 전구체 polyamic acid(PAA)를 합성한 후, 열적-및 화학적-이미드화 반응을 거쳐 에스터 그룹을 가지는 폴리이미드(polyimide, PI) 필름을 합성하였다. PI 합성은 구조적으로 다양한 방향족 디아민을 사용하였다. 각 디아민 구조에 따른 유리전이온도($T_g$)는 167-$215^{\circ}C$를 보였고, 초기분해온도(${T_D}^i$)는 $364-451^{\circ}C$를 나타내었다. 가장 향상된 열팽창 계수(coefficient of thermal expansion, CTE)와 가스차단성은 TFB(3.23 $ppm/^{\circ}C$)와 4,4-ODA(< $10^{-2}cc/m^2/day$) 단량체를 각각 사용하였을 때 보였다. PI 필름의 투과도는 500 nm에서 65-89%를 보였으며, 노란색 정도를 나타내는 황색지수(yellow index, YI)는 3.01-69.52를 보였다.

Keywords

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