Synthesis of highly birefringence liquid crysalline polymers for optical materials
| Project/Area Number |
26288058
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Polymer chemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Keywords | 高複屈折性液晶 / 液晶 / パイ電子系 / 高複屈折液晶 / 構造有機化学 / 光学 / 屈折率 / 複屈折 / 薗頭カップリング / 光学材料 / 高分子 / 縮合系高分子 / 液晶高分子 / 高複屈折 |
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| Outline of Final Research Achievements |
We designed new bistolane nematic liquidc crystals with alkylsulfanyl groups for extraordinary birefringence materials. A symmetric derivative contains short terminal methylsulfanyl groups (SCH3) on both ends, while two asymmetric derivatives contain a methylsulfanyl group on one end, as well as a highly polarizable cyano (CN) or isothiocyanate (NCS) group on the other end. These materials exhibited a well-defined enantiotropic nematic phase, as well as an extremely high birefringence (Δn > 0.6). Most notably, the NCS derivative achieves an extremely high value of 0.77 at 550 nm.
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| Academic Significance and Societal Importance of the Research Achievements |
高複屈折性液晶材料はLCDフィルム、レーザー発振用フィルム、光記憶デバイス等への応用されており、さらなる高複屈折化が求められている。高複屈折性液晶は、偏光板やLCDフィルムを単一成分で作製することができ、ディスプレイの性能向上、大画面化、製造コストの削減など、そのインパクトは計り知れない。今回、実用化にはいくつかの壁があるが、上記の条件を満たす、複屈折0.8に迫る液晶材料の開発に成功した。
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Report
(5 results)
Research Products
(12 results)
