• Polymer Dispersed Liquid Crystal of PVA/E44 Prepared by Emulsion Technique
  • Choi CH, Kim SH, Kim BK
  • 유화법으로 제조한 PVA/E44 고분자분산액정
  • 최치훈, 김선희, 김병규
Abstract
Polymer dispersed liquid crystal(PDLC) films were prepared from poly(vinyl alcohol)(PVA) and E44 using an emulsion technique. Effect of input electric field and the wavelength of incident light on the transmittance have been studied. The threshold electric field was about 20Vp-p/㎛ or 7Vrms/㎛. The transmittance of the powered film increased, rapidly at high and smoothly at low applied voltage, with increasing incident wavelength. However, for unpowered film the transmittance slightly decreased with the increasing wavelength.

유화법을 이용하여 PVA와 E44로 구성최는 고분자분산액정(PDLC)을 제조하였다. 인가전기장 및 입사광의 파장이 막의 투과도에 미치는 영향을 연구하였다. 문턱전장의 세기는 20Vp-p/㎛ 혹은 7Vrms/㎛였다. 전기장 인가시 투과도는 입사광의 파장과 더불어 증가하였다. 한편, 전기장 무인가시에는 입자광의 파장이 증가할수록 투과도는 약간 증가하는 경향을 보였다.

Keywords: PDLC; NCAP; PVA; E44; electrooptics

References
  • 1. Donald AM, Windle AHLiquid Crystalline Polymers, Cambridge University Press, Cambridge (1992)
  •  
  • 2. Priestley EB, Wojtowicz PJ, Sheng PIntroduction to Liquid Crystals, Plenum Press, New York (1974)
  •  
  • 3. Miyamoto A, Kikuchi H, Morimura Y, Kajiyama T, New Polym. Mater., 2, 1 (1990)
  •  
  • 4. March N, Tosi MPolymers, Liquid Crystals, and Low-Dimensional Solids, Plenum Press, New York (1984)
  •  
  • 5. Doane JWLiquid Crystals-Applications and Uses, ed. by B. Bahadur, Vol. 1, World Scientific, Singapore (1990)
  •  
  • 6. Fergason JL, SID Int. Symp. Dig. Tech., 16, 68 (1985)
  •  
  • 7. Fergason JLU.S. Patent, 4,616,903 (1986)
  •  
  • 8. Golemme A, Zumer S, Doane JW, Phys. Rev., A, 37, 559 (1988)
  •  
  • 9. Drazaic PS, J. Appl. Phys., 60(6), 2142 (1986)
  •  
  • 10. Miyamoto A, Kikuchi H, Kobayashi S, Morimura Y, Kajiyama T, Macromolecules, 24(13), 3915 (1991)
  •  
  • 11. Kim BK, Ok YS, J. Appl. Polym. Sci., 49, 1769 (1993)
  •  
  • 12. Choi CH, Kim BK, Kikuchi H, Kajiyama T, Amaya N, Murata Y, J. Appl. Polym. Sci., 50, 2217 (1994)
  •  
  • 13. Mucha M, J. Appl. Polym. Sci., 43, 175 (1991)
  •  
  • 14. Kim BK, Ok YS, J. Polym. Sci. B: Polym. Phys., 32(3), 561 (1994)
  •  
  • 15. Zumer S, Doane JW, Phys. Rev., A, 34, 3373 (1986)
  •  
  • 16. Vilfan I, Vilfan M, Zumer S, Phys. Rev., A, 40, 4724 (1989)
  •  
  • 17. Hikmet RAM, J. Appl. Phys., 68(9), 4406 (1990)
  •  
  • 18. Kelly J, Seekola D, Proc. SPIE, 1257, 17 (1990)
  •  
  • 19. Montgomery GP, J. Opt. Soc. Am., B5, 774 (1988)
  •  
  • 20. Drazaic PS, Gonzales AM, Proc. SPIE, 1665, 32 (1992)
  •  
  • 21. Ding JD, Yang YL, Mol. Cryst. Liq. Cryst., 238(-), 47 (1994)
  •  
  • 22. Zummer S, Doane JW, Phys. Rev., A, 34, 3373 (1986)
  •  
  • 23. Sansone MJ, Khanarian G, Leslie TM, Stiller M, Altman J, Elizondo P, J. Appl. Phys., 67, 4253 (1990)
  •  
  • 24. Born M, Wolf EPrinciple of Optics, Pergamon Press, Oxford (1989)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
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This Article

  • 1994; 18(6): 1035-1040

    Published online Nov 25, 1994