Synthesis of novel soluble rubbing-resistant polyimides used as liquid crystal vertical alignment layers
| Autor: | Qing Gong, Shiming Gong, Lulu Liu, Heng Zhang, Xinguo Zheng, Yinghan Wang |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Biphenyl Materials science Trifluoromethyl 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Triphenylamine 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Liquid crystal Diamine Polymer chemistry Moiety Organic chemistry General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology Alkyl |
| Zdroj: | Liquid Crystals. 43:131-141 |
| ISSN: | 1366-5855 0267-8292 |
| Popis: | A novel functional diamine N12, containing triphenylamine moiety, biphenyl, tert-butyl substituents and long alkyl chain, N,N-bis(4-aminophenyl)-p-(3,5-di-tert-butyl-4-dodecyloxy phenyl) aniline (N12), was synthesised and characterised. A series of polyimides (PIs) were prepared based on 2,2ʹ-bis(trifluoromethyl)benzidine, 4,4ʹ-oxydiphthalicanhydride and different contents of N12 via a conventional two-step procedure that included a ring-opening polyaddition to gain polyamic acids, followed by chemical cyclodehydration. The chemical structures of the intermediates, diamines and PIs were characterised by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. All of the PIs were amorphous and exhibited good solubility in both polar aprotic solvents and some low boiling point solvents. PIs containing different content of N12 could induce highly uniform vertical alignment of liquid crystals (LCs). More importantly, PIs derived from N12 showed a good rubbing resistance. Be... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|