Liquid crystal photoalignment material based on chloromethylated polyimide
- Department of Polymer Science and Technology, Chonbuk National University, 664-I Dukjin, Chonju, Chonbuk 561-756 (Korea, Republic of)
We report a liquid crystal photoalignment material with high photosensitivity and excellent thermal stability. The chloromethylated aromatic polyimide exhibited defect-free homogeneous alignment of liquid crystals upon irradiation of polarized deep ultraviolet (UV) for 50 s. The aligning ability of the film was retained up to 210 deg. C, and the cell containing liquid crystals could be stored at 85 deg. C for more than 14 days without any deterioration. FT-IR and UV-vis spectra confirmed that the alignment was induced by photodecomposition of polyimide, drastically accelerated by the introduction of chloromethyl side group.
- OSTI ID:
- 20634293
- Journal Information:
- Applied Physics Letters, Vol. 85, Issue 13; Other Information: DOI: 10.1063/1.1797560; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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