| Project/Area Number |
15K20992
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Polymer chemistry
Polymer/Textile materials
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
Ishige Ryohei 東京工業大学, 物質理工学院, 助教 (20625264)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 高分子液晶 / ポリイミド / 配向膜 / リオトロピック液晶 / ポリアミド酸エステル / 全芳香族ポリイミド / せん断流動配向 / 広角X線回折 / 偏光赤外分光法 / 配向制御 |
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| Outline of Final Research Achievements |
In order to prepare highly oriented and homogeneous film of aromatic polyimides (PIs) in simple processes, poly(amic ester) (PAE) precursors with long alkyl side chain and long persistence length were newly designed and synthesized because they have a potential to form lyotropic liquid crystal (LC) phase at room temperature. The solutions of the PAE exhibited LC phase and highly oriented film could be prepared by shearing the LC solution. The molecular orientation was maintained during thermal curing involving imidization reaction and highly oriented homogeneous PI films were successfully obtained. Moreover, it was revealed that the PI segments were generated along the orientation direction of the glassy LC matrix of the precursor to increase the orientation order spontaneously
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| Academic Significance and Societal Importance of the Research Achievements |
特定方向の分子鎖が配列したポリイミドPI膜は，液晶ディスプレイの配向膜や高性能のフレキシブル光学素子（偏光子，波長板）等への応用展開が期待される．一般に前駆体溶液から調製されるPI膜では，分子鎖は膜面に沿う傾向はあるが，面内において分子鎖は特定の方向に配列してはいない．本研究で得られた液晶場中での反応に伴う分子鎖の自発的配向の知見は，高配向のPI膜のより容易な作製方法を提供する．
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