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| Cinnamate-functionalized hyperbranched polymer as liquid crystal photo-alignment layer |
| Bin Jun Shen, Zheng Xie, Ya Ning He, Yan Qing Lian |
| Institute of Polymer Research, Department of Chemical Engineering, Laboratory of Advanced Materials, Tsinghua University, Beijing 100084, China |
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Abstract In this work, 4-methoxylcirmamoyl chloride was reacted with a commercial hyperbranched polymer (Boltom~TM H30) to prepare a hyperbranched photosensitive polymer (H30-Ci). The polymer was characterized by UV absorption spectrum and 1H-NMR spectrum. After processed by Linearly Polarized Polymerization (LPP) method, the spin-coated films of H30-Ci were used as photo-alignment layers to assemble liquid crystal (LC) cells containing nematic liquid crystal (5CB). The observation by polarized microscope showed that the H30-Ci blended with a linear polymer (BP-AN-Ci) photo-alignment layers could align LC molecules in a very uniform way.
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Received: 23 April 2008
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| Fund:This research was financially supported by the National Natural Science Foundation of China (No. 50103005). Thanks for Professor Shi Wenfang of University of Science and Technology of China to supply the hyperbranched polymer (H30). |
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Corresponding Authors:
Yan Qing Lian,yqlian@tsinghua.edu.cn
E-mail: yqlian@tsinghua.edu.cn
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