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34249815862
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1359-1370 Photo- and Rubbing-Alignable Brush Polyimides Bearing Three Different Chromophores Suk Gyu Hahm, Taek Joon Lee, and Moonhor Ree Department of Chemistry National Research Lab for Polymer Synthesis & Physics Center for Integrated Molecular Systems, and BK School of Molecular Science Pohang University of Science and Technology Pohang 790-784 (Republic of Korea) ree@postech.edu 10.1002/adfm.200600369 Three new photoreactive brush polyimides (PSPIs, each bearing a different type of chromophore (cinnamoyl (CA, 3-(2-furyl)acryloyl (FA, and methacryloyl (MA, in their bristles i.e, side groups, are successfully synthesized, and are found to produce good-quality films with smooth surfaces through conventional spin-casting and drying processes. These PSPI polymers are thermally stable up to 320°C. This is the first quantitative investigation of the photoaligning and rubbing-aligning processabilities of PSPI polymer films, and of the abilities of the resultant films to con
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-2, and to depend on which film treatment process is used and which chromophore bristle is present. In summary, the new PSPIs reported in this paper are promising LC alignment-layer candidates with rubbing-free processing for the production of advanced LC-display (LCD) devices, including LCD televisions with large display areas. © 2007 WILEY-VCH Verlag GmbH & Co. KCaA
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