유화법으로 제조한 PVA/E44 고분자분산액정

최치훈; 김선희; 김병규

Polymer(Korea), Vol.18, No.6, 1035-1040, November, 1994

Export Citation

유화법으로 제조한 PVA/E44 고분자분산액정

Polymer Dispersed Liquid Crystal of PVA/E44 Prepared by Emulsion Technique

최치훈, 김선희, 김병규

초록

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

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 20V_p-p/㎛ or 7V_rms/㎛. 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.

Keywords:PDLC;NCAP;PVA;E44;electrooptics

[References]

Donald AM, Windle AH, "Liquid Crystalline Polymers," Cambridge University Press, Cambridge (1992)
Priestley EB, Wojtowicz PJ, Sheng P, "Introduction to Liquid Crystals," Plenum Press, New York (1974)
Miyamoto A, Kikuchi H, Morimura Y, Kajiyama T, New Polym. Mater., 2, 1 (1990)
March N, Tosi M, "Polymers, Liquid Crystals, and Low-Dimensional Solids," Plenum Press, New York (1984)
Doane JW, "Liquid Crystals-Applications and Uses," ed. by B. Bahadur, Vol. 1, World Scientific, Singapore (1990)
Fergason JL, SID Int. Symp. Dig. Tech., 16, 68 (1985)
Fergason JL, U.S. Patent, 4,616,903 (1986)
Golemme A, Zumer S, Doane JW, Phys. Rev., A, 37, 559 (1988)
Drazaic PS, J. Appl. Phys., 60(6), 2142 (1986)
Miyamoto A, Kikuchi H, Kobayashi S, Morimura Y, Kajiyama T, Macromolecules, 24(13), 3915 (1991)
Kim BK, Ok YS, J. Appl. Polym. Sci., 49, 1769 (1993)
Choi CH, Kim BK, Kikuchi H, Kajiyama T, Amaya N, Murata Y, J. Appl. Polym. Sci., 50, 2217 (1994)
Mucha M, J. Appl. Polym. Sci., 43, 175 (1991)
Kim BK, Ok YS, J. Polym. Sci. B: Polym. Phys., 32(3), 561 (1994)
Zumer S, Doane JW, Phys. Rev., A, 34, 3373 (1986)
Vilfan I, Vilfan M, Zumer S, Phys. Rev., A, 40, 4724 (1989)
Hikmet RAM, J. Appl. Phys., 68(9), 4406 (1990)
Kelly J, Seekola D, Proc. SPIE, 1257, 17 (1990)
Montgomery GP, J. Opt. Soc. Am., B5, 774 (1988)
Drazaic PS, Gonzales AM, Proc. SPIE, 1665, 32 (1992)
Ding JD, Yang YL, Mol. Cryst. Liq. Cryst., 238, 47 (1994)
Zummer S, Doane JW, Phys. Rev., A, 34, 3373 (1986)
Sansone MJ, Khanarian G, Leslie TM, Stiller M, Altman J, Elizondo P, J. Appl. Phys., 67, 4253 (1990)
Born M, Wolf E, "Principle of Optics," Pergamon Press, Oxford (1989)

[Referenced By]

[1] Donald AM, Windle AH, "Liquid Crystalline Polymers," Cambridge University Press, Cambridge (1992)

[2] Priestley EB, Wojtowicz PJ, Sheng P, "Introduction 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 M, "Polymers, Liquid Crystals, and Low-Dimensional Solids," Plenum Press, New York (1984)

[5] Doane JW, "Liquid 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 JL, U.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 E, "Principle of Optics," Pergamon Press, Oxford (1989)