Preparation and alignment properties of photosensitive polyimide containing benzophenone in main chain

References

• Wang XQ, Shen D, Zheng ZG, et al. Review on liquid crystal photoalignment technologies. Chin J Liq Cryst Displays. 2015;30(5):737–751.
   Google Scholar
• Peeters E, Lub J, Steenbakkers JAM, et al. High-contrast thin-film polarizers by photo-crosslinking of smectic guest-host systems. Adv Mater. 2006;18(18):2412–2417.
   Web of Science ®Google Scholar
• Fleischmann EK, Forst FR, Zentel R. Liquid-crystalline elastomer fibers prepared in a microfluidic device. Macromol Chem Phys. 2014;215(10):1004–1011.
   Web of Science ®Google Scholar
• Jiu-An L, Weiru W, Jixiang X, et al. Photoinduced bending behavior of cross-linked azobenzene liquid-crystalline polymer films with a poly(oxyethylene) backbone. Macromol Rapid Comm. 2014;35(14):1266–1272.
   PubMed Web of Science ®Google Scholar
• Yamaguchi R, Ogura M, Sato S. Photo degradation properties of liquid crystal cell using focused blue-violet laser beam. Mol Cryst Liq Cryst. 2009;507(1):51–55.
   Web of Science ®Google Scholar
• Kang WS, Kim HW, Kim JD. Contrast ratio and switching of zigzag defect-free surface stabilized FLCD by photoinduced alignment. Liq Cryst. 2002;29(4):583–587.
   Web of Science ®Google Scholar
• Jackson PO, O’Neill M, Duffy WL, et al. An investigation of the role of cross-linking and photodegradation of side-chain coumarin polymers in the photoalignment of liquid crystals. Chem Mater. 2001;13(2):694–703.
   Web of Science ®Google Scholar
• Liu YC, Cheng KT, Chen HF, et al. Photo-and electro-isomerization of azobenzenes based on polymer-dispersed liquid crystals doped with azobenzenes and their applications. Opt Express. 2014;22(4):4404–4411.
   PubMed Web of Science ®Google Scholar
• Goda K, Omori M, Takatoh K. Optical switching in guest-host liquid crystal devices driven by photo- and thermal isomerisation of azobenzene. Liq Cryst. 2018;45(4):485–490.
   Web of Science ®Google Scholar
• Lu HB, Xie XY, Xing J, et al. Wavelength-tuning and band-broadening of a cholesteric liquid crystal induced by a cyclic chiral azobenzene compound. Opt Mater Express. 2016;6(10):3145–3158.
   Web of Science ®Google Scholar
• Kimura Y, Kuboyama K, Ougizawa T. Photoalignmentability of silsesquioxane-containing citraconimide and its solvent-induced surface enrichment in PMMA matrix. Liq Cryst. 2019;46(6):884–895.
   Web of Science ®Google Scholar
• Adams DJ, Chappellet S, Lincker F, et al. Identifying photoreaction products in cinnamate-based photoalignment materials. J Phys Chem C. 2014;118(28):15422–15433.
   Web of Science ®Google Scholar
• He R, Wen P, Kang SW, et al. Polyimide-free homogeneous photoalignment induced by polymerisable liquid crystal containing cinnamate moiety. Liq Cryst. 2018;45(9):1342–1352.
   Web of Science ®Google Scholar
• Sasaki A, Aoshima H, Nagano S, et al. A versatile photochemical procedure to introduce a photoreactive molecular layer onto a polyimide film for liquid crystal alignment. Poly J. 2012;44(6):639–645.
   Web of Science ®Google Scholar
• Obi M, Morino S, Ichimura K. Factors affecting photoalignment of liquid crystals induced by polymethacrylates with coumarin side chains. Chem Mater. 1999;11(3):656–664.
   Web of Science ®Google Scholar
• Ryabchun A, Bobrovsky A, Chun SH, et al. A novel generation of photoactive comb-shaped polyamides for the photoalignment of liquid crystals. J Polym Sci Pol Chem. 2013;51(19):4031–4041.
   Web of Science ®Google Scholar
• Kang H, Hong J, Kang D. Liquid crystal alignment behaviors of polystyrene derivatives containing coumarin moieties. Macromol Res. 2014;605(1):103–116.
   Google Scholar
• Shin DM, Song DM, Kim YB. Photochemical reaction on the polymer layer for liquid crystal display. Mat Sci Eng C-Bio S. 2004;24(1–2):127–130.
   Web of Science ®Google Scholar
• Hyun SY, Moon JH, Shin DM, et al. Application of photo-alignment techniques to antiferroelectric liquid crystal cell. Mol Cryst Liq Cryst. 2004;412(1):369–376.
   Web of Science ®Google Scholar
• Li X, Zhong Z, Lee SH, et al. Liquid crystal photoalignment using soluble photosensitive polyimide. Jpn J Appl Phys. 2006;45(2A):906–908.
   Web of Science ®Google Scholar
• Palermo G, Guglielmelli A, Pezzi L, et al. A command layer for anisotropic plasmonic photo-thermal effects in liquid crystal. Liq Cryst. 2018;45(13–15):2214–2220.
   Web of Science ®Google Scholar
• Eremin A, Nadasi H, Hirankittiwong P, et al. Azodendrimers as a photoactive interface for liquid crystals. Liq Cryst. 2018;45(13–15):2121–2131.
   Web of Science ®Google Scholar
• Kawatsuki N, An MX, Matsuura Y, et al. Thermally enhanced photoinduced molecular reorientation in a photo-crosslinkable polymer liquid crystal based on polarization triplet energy transfer. Liq Cryst. 2004;31(1):55–60.
   Web of Science ®Google Scholar
• Kawatsuki N, Tachibana T, An MX, et al. Photoinduced optical anisotropy based on axis-selective triplet energy transfer and thermally enhanced reorientation in a photo-cross-linkable liquid crystalline polymer film. Macromolecules. 2005;38(9):3903–3908.
   Web of Science ®Google Scholar
• Furumi S, Ichimura K. Highly sensitive photoalignment of liquid crystals through polarization preserved triplet energy transfer. Appl Phys Lett. 2004;85(2):224–226.
   Web of Science ®Google Scholar
• Furumi S, Ichimura K. Highly sensitive photoalignment of calamitic and discotic liquid crystals assisted by axis-selective triplet energy transfer. Phys Chem Chem Phys. 2011;13(11):4919.
   PubMed Web of Science ®Google Scholar
• Nakanishi Y, Okamoto K. Relationship between concentration of initiator and image-sticking phenomenon of polymer-sustained-alignment liquid crystal displays. Jpn J Appl Phys. 2012;51(4):1701.
   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
• Lee SW, Sang IK, Lee B, et al. Photoreactions and photoinduced molecular alignments of films of a photoreactive polyimide and their alignment of liquid crystals. Macromolecules. 2003;36(17):6527–6536.
   Web of Science ®Google Scholar
• Chae B, Lee SW, Kim SB, 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
• Kim YH, Min YH, 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
• Sun Z, Qin A, Chen Z, et al. Large pretilt angle induced by an anhydride-terminal hyperbranched polyimide liquid crystal alignment layer. Liq Cryst. 2010;37(3):345–348.
   Web of Science ®Google Scholar
• Kim HT, Lee JW, Sung SJ, 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
• Hahm SG, Lee TJ, Ree M. Photo‐ and rubbing‐alignable brush polyimides bearing three diffe-rent chromophores. Adv Funct Mater. 2010;17(8):1359–1370.
   Web of Science ®Google Scholar
• Schadt M, Schmitt K, Kozinkov V, et al. Surface-induced parallel alignment of liquid crystals by linearly polymerized photopolymers. Jpn J Appl Phys. 1992;31(7):2155–2164.
   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.
   PubMed Web of Science ®Google Scholar
• Ree M, Kim SI, Lee SW. Alignment behavior of liquid-crystals on thin films of photosensitive polymers: effects of photoreactive group and UV-exposure. Synth Met. 2001;117(1–3):273–275.
   Web of Science ®Google Scholar