Song, Yongzhi; Yuan, Lili; Wang, Zhiyuan; Yang, Shiyong published the artcile< Photo-aligning of polyimide layers for liquid crystals>, Computed Properties of 4415-87-6, the main research area is photoaligning polyimide layer liquid crystal display.
A series of soluble and highly transparent semi-alicyclic polyimides (PIs) with designed flexible linkages have been synthesized derived from an alicyclic aromatic dianhydride (1,2,3,4-cyclobutanetetracarboxylic dianhydride, CBDA) and various aromatic ether-bridged diamines. The semi-alicyclic PIs were evaluated as the photo-alignment layers of liquid crystal (LC) mols. in liquid crystal display (LCD). Exptl. results indicate that the photo-alignment characteristics of LC mols. induced by the photo-aligned PI layers and the electro-optical (EO) properties of the LC cell devices are closely related with PI backbone structures. The retardation of the photo-aligned PI layers is correlated with the UV absorption intensity of PI at 220 to approx. 330 nm. The higher UV absorption intensity PI has, the higher retardation and lower pre-tilt angle the photo-aligned PI layer exhibits. The defect-free and photo-aligned PI layer could result into the uniform LC texture, which is highly desired for in-plane switching (IPS) mode LCD devices. In comparison, PI layer containing trifluoromethyl moiety shows poor photo-aligning performance because of the strong electronic withdrawing effect of the fluorinated linkage.
Polymers for Advanced Technologies published new progress about Electrooptical instruments. 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Computed Properties of 4415-87-6.
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem