The impact of the flexibility of photosensitive polyimide backbone on the properties of liquid-crystal alignment under non-polarised ultraviolet light

References

• Sung S-J, Cho K-Y, Park J-K. Photo-induced liquid crystal alignment of poly (vinyl cinnamate) and fluorinated polyimide blends. Mat Sci Eng C-Mater. 2004;24(1–2):181–184.
   Web of Science ®Google Scholar
• Hwang YJ, Hong SH, Lee SG, et al. Surface characteristics of photoaligned polyimide film interfacial reacted with bromine or ethanethiol. Ultramicroscopy. 2008;108(10):1266–1272.
   PubMed Web of Science ®Google Scholar
• Guo M, Wang X. Polyimides with main-chain photosensitive groups: synthesis, characterization and their properties as liquid crystal alignment layers. Eur Polym J. 2009;45(3):888–898.
   Web of Science ®Google Scholar
• Schadt M, Seiberle H. Optical patterning of multidomain LCD. J Soc Inf Display. 2012;5(4):367–370.
   Google Scholar
• Park S, Palai AK, Park J, et al. Synthesis and characterization of photo-crosslinkable coumarin-containing polymer dielectric for organic transistors. Org Electro. 2019;66(3):169–174.
   Web of Science ®Google Scholar
• Essaïdi Z, Krupka O, Iliopoulos K, et al. Synthesis and functionalization of coumarin-containing copolymers for second order optical nonlinearities. Opt Mater. 2013;35(3):576–581.
   Web of Science ®Google Scholar
• Song DM, Shin DM, Choi KY, et al. Synthesis and characterization of photo-sensitive polyimide containing a chalcone structure for photo-alignment of liquid crystals. Colloid Surf A. 2002;198(none):875–879.
   Web of Science ®Google Scholar
• Song D, Jung K, Moon J, et al. Photochemistry of chalcone and the application of chalcone-derivatives in photo-alignment layer of liquid crystal display. Opt Mater. 2003;21(1–3):667–671.
   Web of Science ®Google Scholar
• Murai H, Nakata T, Goto T. Liquid crystal photo-alignment layers made from aromatic bismaleimides[J]. Liq Cryst. 2002;29(5):669–673.
   Web of Science ®Google Scholar
• D S S, D S P, Jeon HJ. Response time mechanism for a photo-aligned vertical-alignment liquid crystal display on a homeotropic alignment layer. Liq Cryst. 2000;27(9):1189–1193.
   Web of Science ®Google Scholar
• Furumi S, Ichimura K. Photogeneration of high pretilt angles of nematic liquid crystals by non-polarized light irradiation of azobenzene-containing polymer films. Adv Funct Mater. 2004;14(3):247–254.
   Web of Science ®Google Scholar
• Zakrevskyy Y, Yaroshchuk O, Kelly J, et al. 3D orientational order in the photoaligning polymer films and its correlation with LC alignment. Mol Cryst Liq Cryst. 2002;375(1):769–783.
   Web of Science ®Google Scholar
• Zhang D, Huang T, Duan L. Emerging self-emissive technologies for flexible displays. Adv Mater. 2020;32(15):1–42.
   Web of Science ®Google Scholar
• Son I, C H C, Moon G, et al. A fast-switching vertically-aligned liquid crystal device based on a multi-functional mesogenic photocrosslinker. Mol Cryst Liq Cryst. 2019;687(1):68–75.
   Web of Science ®Google Scholar
• S H R, M J G, Lee W, et al. Switchable photonic crystals using one-dimensional confined liquid crystals for photonic device application. ACS Appl Mater Interfaces. 2017;9(3):3186–3191.
   PubMed Web of Science ®Google Scholar
• Hiromi I, Mizuho K, Nobuhiro K. Comparison study on thermally stimulated photoinduced orientation of liquid crystalline polymer with cinnamate side groups using 313 nm and 365 nm light. J Photopolym Sci Tec. 2017;30(4):451–456.
   Web of Science ®Google Scholar
• Miyachi K, Kobayashi K, Yamada Y, et al. 41.1: distinguished Paper: the World’s First Photo Alignment LCD Technology Applied to Generation Ten Factory[C]//SID Symposium Digest of Technical Papers. Blackwell Publishing Ltd; 2010. p. 135–136.
   Google Scholar
• S G H, T J L, Ree M. Photo‐ and rubbing‐alignable brush polyimides bearing three different chromophores. Adv Funct Mater. 2010;17(8):1359–1370.
   Google Scholar
• H T K, J W L, S J S, et al. Synthesis, photo-reaction and photo-induced liquid crystal alignment of soluble polyimide with pendant cinnamate group. Liq Cryst. 2000;27(10):1343–1356.
   Web of Science ®Google Scholar
• Chae B, S W L, S B K, et al. Photoreaction and molecular reorientation in films of novel photosensitive polyesters containing n-alkyl side groups and 1,4-phenylenediacryloyl units in the backbone. Langmuir. 2003;19(15):6039–6049.
   Web of Science ®Google Scholar
• Kawatsuki N, Matsuyoshi K, Hayashi M, et al. Photoreaction of photo-cross-linkable methacrylate polymer films comprising 2-Cinnamoyloxyethoxybiphenyl side group by linearly polarized ultraviolet light and liquid crystal alignment on the resultant films. Chem Mater. 2000;12(6):1549–1555.
   Web of Science ®Google Scholar
• Choi S, Lee S, Jeon J, et al. A photoinitiator‐free photosensitive polyimide with low dielectric constant. J Appl Polym Sci. 2010;117(5):2937–2945.
   Web of Science ®Google Scholar
• S W L, I K S, Lee B, et al. Photoreactions and photoinduced molecular orientations of films of a photoreactive polyimide and their alignment of liquid crystals. Macromolecules. 2003;36(17):6527–6536.
   Web of Science ®Google Scholar
• Dong L, Sun H, Wang J, et al. Fluorene based donor‐acceptor polymer electrets for nonvolatile organic transistor memory device applications. J Polym Sci Pol Chem. 2015;53(4):602–614.
   Web of Science ®Google Scholar
• H K Y, Chae B, T J L, et al. Molecular reorientation studies of ultra-violet light irradiated photosensitive polyimide films using two-dimensional infrared correlation spectroscopy. J Mol Struct. 2010;974(1–3):30–34.
   Web of Science ®Google Scholar
• Y H K, Y H M, Lee SW. Synthesis, characterization, and liquid crystal alignment properties of photosensitive polyimide. Mol Cryst Liq Cryst. 2009;513(1):89–97.
   Web of Science ®Google Scholar
• H I J, Chae B, S H L, et al. Photosensitive polyimides with rigid side chain and their thermal stable liquid-crystal alignment properties. Mol Cryst Liq Cryst. 2014;601(1):20–28.
   Web of Science ®Google Scholar
• Kawatsuki N, Yamamoto T, Ono H. Optical anisotropy of photo-crosslinkable polymer film and photoalignment control of nematic liquid crystals using nonpolarized ultraviolet irradiation. Polym J. 1999;31(7):630–632.
   Web of Science ®Google Scholar
• Ichimura K, Akita Y, Akiyama H, et al. Photoreactivity of polymers with regioisomeric cinnamate side chains and their ability to regulate liquid crystal alignment†. Macromolecules. 1997;30(4):903–911.
   Web of Science ®Google Scholar
• Zhu G, Wang F, Liu W, et al. Synthesis of photosensitive polyimide for liquid crystal alignment under non-polarised UV ageing lamp irradiation and a study on the possible mechanism of alignment. Liq Cryst. 2020;47(4):489–499.
   Web of Science ®Google Scholar
• Hailin Y, Zhu G, Wang Y. Preparation of polyimide alignment films with high photosensitivity and low solid content. Liq Cryst. 2020. DOI:10.1080/02678292.2020.1799446
   PubMed Web of Science ®Google Scholar
• Zhu G, Wang F, Gong XJ. Preparation and alignment properties of photosensitive polyimide containing benzophenone in main chain. Liq Cryst. 2020;47(5):750–760.
   Web of Science ®Google Scholar