Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Synthesis of the Low-Hygroscopic Polyimide for 2-Layer Flexible Copper Clad Laminate

2층 연성동박적층판용 저흡습 폴리이미드의 합성

  • Kim, W. (Department of Chemical Engineering, Pusan National University) ;
  • Park, S.J. (Department of Chemical Engineering, Pusan National University) ;
  • Baek, J.O. (Department of Chemical Engineering, Pusan National University) ;
  • Gong, H.J. (Department of Chemical Engineering, Pusan National University) ;
  • Ahn, B.H. (Department of Material Engineering, Pukyong National University)
  • Published : 2008.06.30
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Abstract

In this study, nine kinds of polyimides were synthesized from 1,2,4,5-benzenetetracarboxylic dianhydride (PMDA), 4,4'-(4,4'-isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA), m-pheny lenediamine (m-PDA) and 4,4'-oxydianiline (ODA) by controlling molar ratio of monomers. Synthesized polyimides were used as insulator films for 2-layer Flexible Copper Clad Laminate(FCCL) which were manufactured by the casting method. Glass transition temperature and thermal degradation temperature for 5% weight loss of the polyimide film were improved by increasing contents of m-PDA and PMDA, respectively. Water absorption of polyimide film was reduced by increasing contents of ODA and BPADA which have relatively long structure, respectively. Peel strength of 2-layer FCCL was improved by increasing contents of ODA and BPADA.

본 연구에서는 화학적 구조가 다른 2종의 dianhydride 단량체인 1,2,4,5-benzenetetracar boxylic dianhydride (PMDA)와 4,4'-(4,4'-isopropylidenediphenoxy)bis(phthalic anhydride) (BPADA) 및 2종의 diamine 단량체인 m-phenylenediamine (m-PDA)와 4,4'-oxydianiline (ODA)의 몰 비를 조절함으로써 9종의 폴리이미드를 합성하였다. 합성된 폴리이미드를 사용하여 casting method로 2층형 Flexible Copper Clad Laminate(FCCL)을 제조한 후, 열적 특성, 흡수율 및 접착력을 평가하였다. 제작된 폴리이미드의 유리전이온도$(T_g)$와 시료가 5 wt% 손실되는 분해 온도를 측정한 결과, m-PDA와 PMDA의 함량이 증가할수록 유리전이온도 및 시료가 5 wt% 손실되는 온도가 증가하였다. 폴리이미드의 흡수율은 ODA와 BPADA가 증가할수록 감소하였다. 이는 ODA와 BPADA의 상대적으로 긴 분자 구조 때문으로 판단된다. 박리 시험을 실시한 결과, ODA와 BPADA의 함량이 증가할수록 접착력이 증가하였다.

Keywords

References

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