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UV 흡수 moiety를 갖는 이색성 아조염료를 사용한 편광필름의 제조와 편광특성
Preparation and Polarization Characteristics of Polarizing Film using a Dichroic Azo Dye with UV Absorbing Moiety
서강대학교 화학공학과, 서울 121-742
Department of Chemical Engineering, Sogang University, Seoul 121-742, Korea
HWAHAK KONGHAK, August 2001, 39(4), 411-416(6), NONE
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Abstract
UV 흡수 moiety를 갖는 이색성 아조염료를 합성한 후, 염착공정에 의해 poly(vinyl alcohol), PVA-dye 편광필름을 제조하였다. UV 흡수 염료를 가지고 제조한 PVA 착체의 UV-Visible 스펙트럼은 556 nm에서 염료 발색단에 해당되는 흡수 peak를 나타내었다. 본 연구에서 제조한 편광필름은 99.5%의 높은 편광효율과 40.5%의 투과도를 나타내었다. 특히 UV-B 영역에 대한 UV 차단 효과는 뛰어났다. PVA-UV 흡수 염료계 편광필름의 열과 습도에 대한 내구성은 일반적으로 사용되는 PVA-I2 편광필름에 비해 우수하였다.
A novel dichroic azo dye having UV absorbing moiety was synthesized and then poly(vinyl alcohol), PVA-dye polarizing film was prepared by dyeing process. The UV-Visible spectrum of PVA complex prepared with a UV absorbing dye showed absorption band corresponding to dye chromophore at 556 nm. The prepared polarizing film exhibited a high polar-ization efficiency of 99.5% and a good transmittance of 40.5%. Especially, UV shielding effect for UV-B range was excellent. The heat and humidity resistance of PVA-UV absorbing dye polarizing film was higher than that of a conventional PVA-I2 polarizing film.
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References
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Bastiaansen C, Schmidt HW, Nishino T, Smith P, Polymer, 34(18), 3951 (1993)
Mizoguchi R, Kobatashi K, Shimoura T, Kobayashi S, Display, 201 (1983)
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Hayashi N, Ogino K, Kuratea N, Fujita F, Proceeding of 1998 SID International Symposium Digest of Technical Papers (1998)
Toyokazu O, "Dye Containing Light Polarizing Film," U.S. Patent, 5,310,509 (1992)
Oh SY, Shin DY, J. Korean Ind. Eng. Chem., 11(4), 426 (2000)
Duxbury DF, Dyes Pigments, 25, 131 (1994)
Tsatsatoni EG, Kehayoglou AH, Dyes Pigments, 28, 123 (1995)
Kehayoglou AH, Tsatsaroni EG, Eleftheriadis IC, Loufakis KC, Kyriazis LE, Dyes Pigments, 34, 207 (1997)
Cooke G, Thomas W, European Patent, 0774 539 A2 (1996)
Studenov VI, Tomilin MG, J. Opt. Technol., 66, 6 (1999)
Driscoll WG, Vaughan W, "Handbook of Optics," Chap. 10, McGrawHill, New York (1978)
Standard of Electronic Industries Association of Japan; LD-201 (1983)
Zollinger H, "Color Chemistry: Synthesis, Proerties and Applications of Organic Dyes and Pigments," 2(nd) ed., VCH Publishers. Inc., New York (1991)
Noh BK, "LCD ENGINEERING," 1(st) ed., Sungandang, Seoul, Korea (2000)
Peters AT, Freeman HS, "Modern Colorants: Synthesis and Structure," Chapman & Hall, London (1995)
Toyokazu O, "Dye Containing Light Polarizing Film," U.S. Patent, 5,310,509 (1992)
Yoriaki M, "Azo Compounds and Polarizing Films using the Compounds," U.S. Patent, 5,698,682 (1997)
Konoe M, "Polarizing Film: Polymer Film Base Containing Substituted Anthraquinine Dichroic Dye," U.S. Patent, 5,420,601 (1993)
Dirix Y, Tervoort TA, Bastiaansen C, Macromolecules, 28(2), 486 (1995)
Dirix Y, Tervoort TA, Bastiaansen C, Macromolecules, 30(7), 2175 (1997)
Zwick MM, J. Appl. Polym. Sci., 9, 2393 (1965)
Zwick MM, J. Polym. Sci. A-1, 4, 1642 (1966)
Takamiya H, Tanahashi Y, Matsuyama T, Tanigami T, Yamaura K, Matsuzawa S, J. Appl. Polym. Sci., 50, 1807 (1993)
Oishi Y, Yamamoto H, Miyasaka K, Polymer, 19, 126 (1987)
Khan G, Bobrov YA, "Dichroic Light Polarizer," U.S. Patent, 6,049,428 (2000)
