دورية أكاديمية
Synthesis and characterization of soluble ester-containing polyimide alignment layers with high voltage holding ratio features and potential applications in TFT-LCDs
| العنوان: | Synthesis and characterization of soluble ester-containing polyimide alignment layers with high voltage holding ratio features and potential applications in TFT-LCDs |
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| المؤلفون: | X. X. Zhi, H. S. Bi, J. G. Liu, Y. S. Gao, Y. L. Zhang, Y. C. Zhou, Y. Zhang, X. Wu, X. M. Zhang |
| المصدر: | eXPRESS Polymer Letters, Vol 13, Iss 10, Pp 923-936 (2019) |
| بيانات النشر: | Budapest University of Technology, 2019. |
| سنة النشر: | 2019 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Chemical technology |
| مصطلحات موضوعية: | Industrial applications, Polyimide, Alignment layer, TFT-LCD, Voltage holding ratio, Materials of engineering and construction. Mechanics of materials, TA401-492, Chemical technology, TP1-1185 |
| الوصف: | Novel ester-containing polyimide (PI) resins have been synthesized from an alicyclic dianhydride monomer, 4,4'-dihydroxybiphenyldicyclohexanecarboxylate-3,3',4,4'-tetracarboxylic acid dianhydride (HTABP) and various aromatic diamines. The derived PI resins (PI-1~PI-5) were easily soluble in N-methyl-2-pyrrolidinone (NMP) and gamma-butyrolactone (GBL). The PI alignment agents prepared from the HTABP-PI resins, NMP solvent, and the butyl cellulose (BC) leveling agent with a solid content of 6 wt% showed good stability during the storage at 25 °C for half a year. Smooth and uniform PI alignment layers were formed by spin-coating the PI varnishes onto indium tin oxide (ITO) substrates, followed by thermally baking at the temperature up to 230 °C. Liquid crystal (LC) cells were successfully fabricated by using the rubbing treated PI layers as the alignment components for LC molecules. The LC cells fabricated with the newly-developed PI alignment layers exhibited good electro-optical properties with the pretilt angles around 1.26–2.82° and voltage holding ratio (VHR) as high as 98.36% at room temperature. The residual direct current voltage (RDC) values of the HTABP-PI alignment layers were in the range of 915–2146 mV due to the high volume resistivity values of the PI layers. In addition, the HTABPPI layers showed good thermal stability with the 5% weight loss temperatures (T5%) higher than 415 °C and glass transition temperatures (Tg) in the range of 150.5–201.4 °C. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1788-618X |
| Relation: | http://www.expresspolymlett.com/letolt.php?file=EPL-0010039&mi=cd; https://doaj.org/toc/1788-618X |
| DOI: | 10.3144/expresspolymlett.2019.80 |
| URL الوصول: | https://doaj.org/article/d148713c7976439d9f89fc68131bc9f5 |
| رقم الأكسشن: | edsdoj.148713c7976439d9f89fc68131bc9f5 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 1788618X |
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| DOI: | 10.3144/expresspolymlett.2019.80 |