• Crystallization Behavior of Poly(vinylidene fluoride) in a Confined Space
  • Cho JH, Cho SJ, Lee EJ, Lee KH
  • 제한 공간하에서 폴리(비닐리덴 플루오라이드)의 결정화 거동
  • 조재한, 조수정, 이은지, 이광희
Abstract
Thin films of poly(vinylidene fluoride) (PVDF) with a thickness ranging from 2.0 to 8.5 μm were prepared by spin-coating onto glass slides. The phase characteristics of the films were investigated with Fourier transform infrared spectroscopy (FTIR). The appearance of the ferroelectric β-form crystals was found to be very sensitive to the film thickness. The content of β-form crystals first increased with increasing the film thickness, reached a maximum at some point and then rapidly decreased with a further increase in the film thickness. These results suggested that the formation of β-form crystals could be enhanced by providing spatial constrains to the crystal growth of PVDF.

슬라이드 글라스에 스핀 코팅하여 2.0에서 8.5 μm까지 두께를 가지는 poly(vinylidene fluoride)(PVDF) 필름을 제조하였다. 제조한 필름의 상 특성을 적외선 분광기로 조사하였다. 강유전성을 나타내는 β-form 결정의 형성 정도는 필름 두께에 매우 민감하게 영향을 받았다. 필름 두께의 증가에 따라서 β-form 결정 함량은 점진적으로 증가하다가 일정 두께(~7 μm)를 넘어서면 급격히 감소하였다. 이러한 결과는 결정화 공간의 제어를 통하여 β-form 결정을 보다 효과적으로 발현시킬 수 있음을 알려주었다.

Keywords: poly(vinylidene fluoride); crystallization; confined space; β-form crystal

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This Article

  • 2016; 40(4): 511-515

    Published online Jul 25, 2016

  • 10.7317/pk.2016.40.4.511
  • Received on Aug 6, 2015
  • Accepted on Feb 14, 2016