JANG Minsok, YU Haifeng, HE Yanning, LIAN Yanqing, WANG Xiaogong. A NOVEL SOLUBLE AZO POLYIMIDE AND ITS APPLICATION AS LIQUID CRYSTAL PHOTO-ALIGNMENT LAYER[J]. Acta Polymerica Sinica, 2004,(3):321-326.
JANG Minsok, YU Haifeng, HE Yanning, LIAN Yanqing, WANG Xiaogong. A NOVEL SOLUBLE AZO POLYIMIDE AND ITS APPLICATION AS LIQUID CRYSTAL PHOTO-ALIGNMENT LAYER[J]. Acta Polymerica Sinica, 2004,(3):321-326.DOI:
A novel soluble photosensitive azo polyimide was synthesized from 4
4'-di(1
2-anhydride-4-carboxylate) azobenzene and 4
4'-diamino-4″-hexadecyloxy triphenylmethane through a polyimidization reaction The structure and properties of the obtained pelyimide weTe characterized by using 1H-NMHDSC.FrnR and UV-Vis spectroscopy The polymer showed significant photochromic effect upon UV irradiation due to the cis-trails photoisomerization.It was observed that the thin films of the polymer
after being irradiated with linearly polarized UV light and assembled in LC cells as alignment Lavers
coilld induee uniaxial homogenous orientation of nematic LC molecules.