Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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1-D Microstructure Evolution of Electrostatic Sprayed Thermosetting Phenol-formaldehyde Resin Coating

정전분무법으로 제작된 열경화성 Phenol-formaldehyde resin 코팅층의 1차원적 미세구조 형성 메카니즘

  • Kim, Baek Hyun (Department of Materials Engineering, Korea Aerospace University) ;
  • Bae, Hyun Jeong (Department of Materials Engineering, Korea Aerospace University) ;
  • Goh, Yumin (Department of Materials Engineering, Korea Aerospace University) ;
  • Kwon, Do-Kyun (Department of Materials Engineering, Korea Aerospace University)
  • 김백현 (한국항공대학교 항공재료공학과) ;
  • 배현정 (한국항공대학교 항공재료공학과) ;
  • 고유민 (한국항공대학교 항공재료공학과) ;
  • 권도균 (한국항공대학교 항공재료공학과)
  • Received : 2016.04.18
  • Accepted : 2016.07.29
  • Published : 2016.09.27
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Abstract

Microstructure evolutions of thermosetting resin coating layers fabricated by electrostatic spray deposition (ESD) at various processing conditions were investigated. Two different typical polymer systems, a thermosetting phenol-formaldehyde resin and a thermoplastic polyvinylpyrrolidone (PVP), were employed for a comparative study. Precursor solutions of the phenol-formaldehyde resin and of the PVP were electro-sprayed on heated silicon substrates. Fundamental differences in the thermomechanical properties of the polymers resulted in distinct ways of microstructure evolution of the electro-sprayed polymer films. For the thermosetting polymer, phenol-formaldehyde resin, vertically aligned micro-rod structures developed when it was deposited by ESD under controlled processing conditions. Through extensive microstructure and thermal analyses, it was found that the vertically aligned micro-rod structures of phenol-formaldehyde resin were formed as a result of the rheological behavior of the thermosetting phenol-formaldehyde resin and the preferential landing phenomenon of the ESD method.

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