• Surface Characterization of Poly(vinylidene fluoride) and Poly(methyl methacrylate) Blend Coatings Prepared by Dispersion Coating
  • Seok KH, Ha JW, Lee SB, Park IJ, Kim HJ
  • 분산코팅에 의해 형성된 Poly(vinylidene fluoride)와 Poly(methyl methacrylate) 블렌드 코팅층의 표면 특성
  • 석광희, 하종욱, 이수복, 박인준, 김형중
Abstract
Surface properties such as morphology, crystalline structure, and chemical composition of poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blend coatings prepared by dispersion coating on poly(ethylene terephthalate) (PET) film have been investigated. It was observed that the surface properties were greatly influenced by the coating temperature and blend composition according to SEM, ATR-FTIR and XPS analysis. The typical surface morphology of α-crystalline structure of PVDF could be observed when the coating temperature was lower than 120 ℃ or the amount of PVDF was higher than 80 wt% in the blend. Otherwise, the crystalline structure was changed from α-crystal to γ-crystal or amorphous state. Based on the XPS analysis, the surface segregation of PVDF chains in the blend coating was confirmed.

본 연구에서는 poly(ethylene terephthalate)(PET) 필름을 기재로 하여 분산코팅에 의해 형성된 poly(vinylidene fluoride)(PVDF)와 poly(methyl methacrylate)(PMMA) 블렌드 코팅의 표면 특성을 관찰하였다. 분산코팅의 특성상 저온에서 형성된 블렌드 코팅은 PVDF 입자의 형태와 결정구조가 그대로 유지되었으나 120 ℃ 이상의 코팅온도에서 형성된 코팅의 경우 블렌드에 포함되어 있는 PVDF의 양에 따라 다양한 표면 특성을 나타내었다. 블렌드 중 PVDF의 양이 80 wt% 이상인 경우 PVDF의 α-결정구조에 의한 특성이 확실히 관찰되는 반면에 PMMA의 양이 증가하면 표면 형태와 결정구조의 변화가 변화하는 것을 관찰하였다. 또한 코팅층의 최외각 표면에 대한 XPS 분석 결과는 분산코팅에서도 PVDF의 표면 이행성이 나타남을 보여준다.

Keywords: PVDF; PMMA; dispersion coating; surface; PET substrate.

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This Article

  • 2013; 37(2): 177-183

    Published online Mar 25, 2013

  • Received on Oct 17, 2012
  • Accepted on Dec 4, 2012