Original Article
  • Adhesive Strength and Interface Characterization of CF/PEKK Composites with PEEK, PEI Adhesives Using High Temperature oven Welding Process

  • Seong-Jae Park*, Kyo-Moon Lee*, Soo-Jeong Park**, Yun-Hae Kim*,**†

  • * Major of Materials Engineering, Department of Marine Equipment Engineering, Korea Maritime and Ocean University
    ** Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University

  • 고온 오븐 접합을 적용한 PEEK, PEI 기반 CF/PEKK 복합재의 접착 강도 및 계면 특성 평가

  • 박성재*· 이교문*· 박수정**· 김윤해*,**†

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study was conducted to determine the effect of molecular formation of adhesive on interface characterization of thermoplastic composites. Carbonfiber/polyetherketoneketone (CF/PEKK) thermoplastic composites were fusion bonded and PEEK, PEI adhesive bonded using a high-temperature oven welding process. In addition, lap shear strength test and fracture surface analysis using a digital optical microscope and a scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR) were performed. As a result, the adhesive bonding method improved adhesion strength with interphase having increased molecular formation of ether groups, ketone groups, and imide groups which mainly constitutes the CF/PEKK and adhesives. Furthermore, it was found that the use of PEEK containing more ether groups and ketone groups forms a more strongly bonded interphase and enhances the adhesive force of the CF/PEKK composites.


본 연구에서는 접착제를 구성하는 분자 결합 구조의 차이가 열가소성 복합재의 계면 특성에 미치는 영향을 판단하기 위해 진행되었다. 고온 오븐 접합 공정을 이용하여 carbonfiber/polyetherketoneketone(CF/PEKK) 열가소성 복합재료를 융합 접합, polyetheretherketone(PEEK), polyetherimide(PEI) 접착제 접합하였다. 그리고 lap 전단 강도 시험과 디지털 광학 현미경과 주사 전자 현미경을 이용한 파단면 분석, FTIR 분석을 수행하였다. 그 결과, 접착제 접합은 CF/PEKK와 접착제를 구성하는 주요 결합기인 에테르기, 케톤기, 이미드기의 결합이 증가한 인터페이즈를 형성하여 접착 강도를 강화시켰다. 그리고, 에테르기와 케톤기를 더 많이 함유한 PEEK를 사용하는 것이 더 강한 결합력을 갖는 인터페이즈를 형성하여, 복합재의 접착 강도를 향상시켰다


Keywords: 열가소성 복합재료(Thermoplastic composites), 오븐 접합 공정(Oven welding process), 융합 접합(Fusion bonding), 접착제 접합(Adhesive bonding), Lap 전단 강도(Lap shear strength)

This Article

Correspondence to

  • Yun-Hae Kim

  • * Major of Materials Engineering, Department of Marine Equipment Engineering, Korea Maritime and Ocean University
    ** Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime and Ocean University

  • E-mail: yunheak@kmou.ac.kr