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http://dx.doi.org/10.7317/pk.2013.37.1.66

Studies on Durability and Polarization Properties of Poly(vinyl alcohol) Polarizing Films Prepared with Reactive Dichroic Dyes  

Choi, E-Joon (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Choi, Seung Sock (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Park, Il Hyun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Chang, Jin Ho (Department of Materials Design Engineering, Kumoh National Institute of Technology)
Back, Sang-Hyun (Kolon Industries, Inc.)
Park, Sang-Bong (Kolon Industries, Inc.)
Publication Information
Polymer(Korea) / v.37, no.1, 2013 , pp. 66-73 More about this Journal
Abstract
Three reactive dichroic dyes with 3,5-dichloro-2,4,6-triazine moiety were synthesized by reaction between dichroic dyes (such as congo red, direct black 22 or direct black 4) and cyanuric chloride. Poly(vinyl alcohol) (PVA) films were dyed with the obtained three reactive dichroic dyes. After 400% drawing of the PVA films, their optical properties were compared with an iodine-doped PVA film prepared in the same condition. Durability test was performed at $50^{\circ}C$ in 85% of relative humidity for 120 hrs. We found that compared with the iodine-doped PVA polarizing film, the relative durability of the PVA polarizing film dyed with the reactive dichroic dyes was greatly improved.
Keywords
poly(vinyl alcohol); polarizing film; reactive dichroic dye; durability; polarization efficiency; transmittance;
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