Synthesis and characterisation of novel soluble polyimides for the application as liquid crystal vertical alignment layers

References

• Liaw DJ, Wang KL, Huang YC, Lee KR, Lai JY, Ha CS. Advanced polyimide materials: syntheses, physical properties and applications. Pro Polym Sci. 2012;37:907–974. doi:10.1016/j.progpolymsci.2012.02.005
   Web of Science ®Google Scholar
• Wang J, Wang L, Zeng Y, Fang Y, Zhang Q, Wang Y. A study of the transition of liquid-crystal alignment from homeotropic to planar on a polyimide layer. Liq Cryst. 2010;37:271–278. doi:10.1080/02678290903443905
   Web of Science ®Google Scholar
• Sun Z, Qin A, Chen Z, Wang Y. Large pretilt angle induced by an anhydride-terminal hyperbranched polyimide liquid crystal alignment layer. Liq Cryst. 2010;37:345–348. doi:10.1080/02678290903564437
   Web of Science ®Google Scholar
• Zhang Q, He J, Fang Y, Wang Y. Synthesis of novel hyperbranched polyimide for liquid crystal alignment. Liq Cryst. 2008;35:385–388. doi:10.1080/02678290801932876
   Web of Science ®Google Scholar
• Lee SB, Shin GJ, Chi JH, Zin W, Jung JC, Hahm SG, Ree M, Chang T. Synthesis, characterization and liquid-crystal-aligning properties of novel aromatic polypyromellitimides bearing (n-alkyloxy) biphenyloxy side chains. Polymer. 2006;47:6606–6621. doi:10.1016/j.polymer.2006.07.036
   Web of Science ®Google Scholar
• Hatoh H, Ishikawa M, Hirata J, Hisatake Y, Yamamoto T. Improvement of viewing angle characteristics in a twisted-nematic liquid-crystal display by using a cholesteric liquid-crystal compensation layer. Appl Phys Lett. 1992;60:1806–1808. doi:10.1063/1.107170
   Web of Science ®Google Scholar
• Yang KH. Two-domain 80°-twisted nematic liquid crystal display for grayscale applications. Jpn J Appl Phys. 1992;31:L1603–L1605. doi:10.1143/JJAP.31.L1603
   Web of Science ®Google Scholar
• Kiefer R, Weber B, Windscheid F, Baur G. In-plane switching of nematic liquid crystals. In: Proceedings of the 12th International Display Research Conference (Japan display’92); 1992 Oct 12–14; Hiroshima: Society for Information Display; 1992.
   Google Scholar
• Oh-e M, Ohta M, Aratani S, Kondo K. Principles and characteristics of electro-optical behaviour with in-plane switching mode. In: Proceedings of the 15th International Display Research Conference (Asia display’95); 1995 Oct 16–19; Hamamatsu: Institute of Television Engineers of Japan; 1995.
   Google Scholar
• Seiberle H, Schadt M. Photo-alignment and patterning of planar and homeotropic liquid crystal display configurations. In: Proceedings of the 18th International Display Research Conference (Asia display ’98); 1998 Sep 28–Oct 1; Seoul: Society for Information Display; 1998.
   Google Scholar
• Takeda A, Kataoka S, Sasaki T, Chida H, Tsuda H, Ohmuro K, Sasabayashi T, Koike Y, Okamoto K. 41.1: A super-high image quality multi-domain vertical alignment LCD by new rubbing-less technology. SID Symposium Digest of Technical Papers. 1998;29:1077–1080. doi:10.1889/1.1833672
   Google Scholar
• Lien A, John RA, Angelopoulos M, Lee KW, Takano H, Tajima K, Takenaka A. UV modification of surface pretilt of alignment layers for multidomain liquid crystal displays. Appl Phys Lett. 1995;67:3108–3110. doi:10.1063/1.114849
   Web of Science ®Google Scholar
• Sakai T, Ishikawa K, Takezoe H. Orientational relationship among main and side chains of a polyimide alignment layer, liquid crystals monolayer and bulk pretilt angle. Liq Cryst. 2002;29:47–55. doi:10.1080/02678290110091653
   Web of Science ®Google Scholar
• Liu Z, Yu F, Zhang Q, Zeng Y, Wang Y. Preparation and characterization of a novel polyimide liquid crystal vertical alignment layer. Eur Polym J. 2008;44:2718–2727. doi:10.1016/j.eurpolymj.2008.05.009
   Web of Science ®Google Scholar
• Fang Y, Wang J, Zhang Q, Zeng Y, Wang Y. Synthesis of soluble polyimides for vertical alignment of liquid crystal via one-step method. Eur Polym J. 2010;46:1163–1167. doi:10.1016/j.eurpolymj.2009.12.021
   Web of Science ®Google Scholar
• Mada H, Sonoda T. A proposal on and verification of surface alignment of liquid crystals aligned by frictional rubbing. Jpn J Appl Phys. 1993;32:L1245–L1247. doi:10.1143/JJAP.32.L1245
   Web of Science ®Google Scholar
• Liaw DJ, Hsu PN, Chen WH, Lin SL. High glass transitions of new polyamides, polyimides, and poly(amide−imide)s containing a triphenylamine group: synthesis and characterization. Macromolecules. 2002;35:4669–4676. doi:10.1021/ma001523u
   Web of Science ®Google Scholar
• Cheng SH, Hsiao SH, Su TH, Liou GS. Novel aromatic poly(amine-imide)s bearing a pendent triphenylamine group: synthesis, thermal, photophysical, electrochemical, and electrochromic characteristics. Macromolecules. 2005;38:307–316. doi:10.1021/ma048774d
   Web of Science ®Google Scholar
• Guo CJ, Sun Z, Xia S-L, Wang Y-H. A preliminary inquiry into the conformation of the side chains on polyimide film and the mechanism of the vertical alignment of liquid crystals induced by polyimides with side chains. Liq Cryst. 2012;39:721–728. doi:10.1080/02678292.2012.677487
   Web of Science ®Google Scholar
• Ghaemy M, Alizadeh R. Synthesis of soluble and thermally stable polyimides from unsymmetrical diamine containing 2,4,5-triaryl imidazole pendent group. Eur Polym J. 2009;45:1681–1688. doi:10.1016/j.eurpolymj.2009.03.006
   Web of Science ®Google Scholar
• Shao Y, Li YF, Zhao X, Wang XL, Ma T, Yang FC. Synthesis and properties of fluorinated polyimides from a new unsymmetrical diamine: 1,4-(2′-trifluoromethyl-4′,4′′-diaminodiphenoxy)-benzene. J Polym Sci Part A: Polym Chem. 2006;44:6836–6846. doi:10.1002/pola.21777
   Web of Science ®Google Scholar
• Chung IS, Kim SY. Soluble polyimides from unsymmetrical diamine with trifluoromethyl pendent group. Macromolecules. 2000;33:3190–3193. doi:10.1021/ma991561h
   Web of Science ®Google Scholar
• Liu JG, He MH, Zhou HW, Qian ZG, Wang FS, Yang SY. Organosoluble and transparent polyimides derived from alicyclic dianhydride and aromatic diamines. J Polym Sci Part A: Polym Chem. 2002;40:110–119. doi:10.1002/pola.10100
   Web of Science ®Google Scholar
• Xia S, Yi L, Sun Z, Wang Y. The effect of phthalimide side chains on the thermal stability and rubbing resistance of polyimide used as a liquid crystal vertical alignment layer. J Appl Polym Sci. 2013;20:219.
   Google Scholar
• Xia S, Yi L, Sun Z, Xiang J, Hu J, Wang YH. Synthesis and characterisation of rubbing-resistant polyimides with naphthalimide side-chain for liquid crystal alignment layers. Liq Cryst. 2013;40:756–768. doi:10.1080/02678292.2013.783138
   Web of Science ®Google Scholar
• Yang CP, Chen RS, Wei CS. Synthesis and properties of soluble and light-colored poly(amide-imide-imide)s based on tetraimide-dicarboxylic acid condensed from 4,4’-oxydiphthalic anhydride, 2,2-bis[4-(4-aminophenoxy)phenyl]sulfone, and m-aminobenzoic acid, and various aromatic diamines. J Polym Res. 2002;9:97–105.
   Web of Science ®Google Scholar
• Wang L, Chang P, Cheng CL. Structural effects of pendant groups on thermal and electrical properties of polyimides. J Appl Polym Sci. 2006;100:4672–4678. doi:10.1002/app.22673
   Web of Science ®Google Scholar
• Kim SI, Ree M, Shin TJ, Jung JC. Synthesis of new aromatic polyimides with various side chains containing a biphenyl mesogen unit and their abilities to control liquid-crystal alignments on the rubbed surface. J Polym Sci Part A: Polym Chem. 1999;37:2909–2921. doi:10.1002/(SICI)1099-0518(19990801)37:15<2909::AID-POLA24>3.0.CO;2-B
   Web of Science ®Google Scholar
• Wang X, Zhang P, Chen Y, Luo L, Pang Y, Liu X. Characterization of alignment correlation between LC molecules and chemical groups on/in the surface of polyimide films with biphenyl side chains. Macromolecules. 2011;44:9731–9737. doi:10.1021/ma201781s
   Web of Science ®Google Scholar