Oh, Se Young published the artcileDurability and polarization characteristics of PVA polarizing film prepared with a dichroic azo dye, HPLC of Formula: 92-36-4, the publication is Kongop Hwahak (2000), 11(4), 426-431, database is CAplus.
A novel dichroic azo dyes having a benzothiazole moiety were synthesized and used to prepare poly(vinyl alc.) (PVA)-based polarizing films for application in liquid crystal displays. The UV-Visible spectrum of PVA-dye polarizing film showed absorption bands corresponding to aromatic rings and dye chromophoric species at 326 and 584 nm. The polarization efficiency and the transmittance of PVA-dye polarizing film were significantly influenced by dye concentration, dipping time and addition of salt catalyst. The PVA-dye polarizing film exhibited a high polarization efficiency of 99.5% and a good transmittance of 42%. Especially, the heat and humidity resistance of PVA-dye polarizing film was higher than that of a conventional PVA-I2 polarizing film.
Kongop Hwahak published new progress about 92-36-4. 92-36-4 belongs to thiazole, auxiliary class Organic Pigment, name is 2-(4-Aminophenyl)-6-methylbenzothiazole, and the molecular formula is C14H12N2S, HPLC of Formula: 92-36-4.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica