Liquid crystal alignment generated by linearly polarized UV light on photoactive low molecular mass compounds |
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| Authors: | Chun-Hua Zhang Zheng-Hua Yang Meng-Xian Ding |
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| Affiliation: | 1. State Key Laboratory of Polymer Physics and Chemistry, Chinese Academy of Science, PR China 130022;2. Changchun Institute of Applied Chemistry, Chinese Academy of Science, PR China 130022 |
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| Abstract: | Alignment films prepared from low molar mass photo-crosslinkable materials containing the cinnamate group can be used for aligning LCs after irradiating the films with linearly polarized UV light. The high contrast observed in the polarizing optical microscope between dark and bright images indicates that the alignment is quite uniform. As the photoreaction progresses, the average roughness of the films is increased. All the aggregate structures, ‘lamellar crystals’, produced by the photo-crosslinking reaction are of a square shape. |
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| Keywords: | liquid crystal homeotropic texture twist grain boundary electroclinic effect |
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