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HWAHAK KONGHAK,
Vol.39, No.4, 411-416, 2001
Vol.39, No.4, 411-416, 2001
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
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.
Keywords:
UV Absorbing Dye; PVA-Dye Polarizing Film; Polarization Efficiency; Transmittance; UV Shielding Effect
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