Development and Optical and Electric Properties of Novel Polymer Liquid Crystals with Opto-functional Properties

具有光电功能的新型聚合物液晶的研制及其光电性能

• 批准号: 04640504
• 负责人: TAKENAKA Shunsuke
• 金额: $ 1.41万
• 依托单位: Yamaguchi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04640504/
• 关键词: Synthesis; Liquid crystals; Glass transformation; Thermal properties; Phase transition; Dielectric properties; Light valve; Polymer liquid crystals; ネマチック; スメクチック; 光機能性; ライトバルブ; 電場応答性; 分子構造; 高分子; 非線形光学; 表示材料; 液晶性; ガラス状態

In the present work, some liquid crystalline materials with a long-alkoxyl group at the lateral position were synthesized, and their thermal properties were investigatied with DSC thermogram. The results showed that the lateral long-alkoxy1 group reduces the liquid crystalline properties, and facilitate the glassy transformation, and the terminal long-alkoxy1 groups enhance the glassy transformation temperature, and the lateral one reduce it. Interestingly, some members show 2-steps glassy transformation similar to usual polymer materials.The related polymers as shown above were synthesized, and investigated the thermal and opto-electrical properties. Compounds 1 and 2 show a nematic phase and as well as a smectic one when both terminal alkoxy1 groups are suitably long. The cyano derivatives(2) have two states, i.e., homogeneous, and homeotropic states under an electric or a magnitic field. The former and latter states correspond to a light scattering and transparent states, respectively. The results indicate that the polymers are possible to apply to the light-valve devices.On the other hand, compound 3 shows only smectic A and C phases, and the molecular arrangement in these states does not change by the physical forces.

本文合成了侧位含长烷氧基的液晶材料，并利用DSC热谱研究了它们的热性能。结果表明，侧链长烷氧基1降低了液晶性，促进了玻璃化转变，端链长烷氧基1提高了玻璃化转变温度，侧链长烷氧基1降低了玻璃化转变温度，有趣的是，一些成员表现出类似于通常聚合物材料的两步玻璃化转变。并研究了热性能和光电性能。当两个末端烷氧基1基团都适当长时，化合物1和2显示出双晶相以及近晶相。氰基衍生物（2）具有两种状态，即，在电场或磁场下的均匀和垂直状态。前一种状态和后一种状态分别对应于光散射状态和透明状态。结果表明，该聚合物具有应用于光阀器件的可能性，而化合物3仅表现出近晶A相和C相，且在这些状态下的分子排列不受物理力的影响。

项目成果

S.Takenaka and K.Teshima: "Substituent Effects on Mesomorphic Properties of Some Liquid Crystals with 4-Nitrobenzene at the Terminal Position" Bull.Chem.Soc.Jpn.67. (1994)

S.Takenaka 和 K.Teshima：“取代基对末端带有 4-硝基苯的某些液晶介晶性质的影响”Bull.Chem.Soc.Jpn.67。

S.Takenaka and H.Yamasu: "Studies on Glassy Transformation of Liquid Crystalline Materials" Faraday Trans.90. (1994)

S.Takenaka 和 H.Yamasu：“液晶材料玻璃态转变的研究”Faraday Trans.90。

Shunsuke Takenaka: "Synthesis and Thermal Properties of Nouel Polymer Liquid Crystals having a Laterally-attached Liquid Crystalline core at the Side Chain" Molecular Crystals and Liquid Crystals. (印刷中).

Shunsuke Takenaka：“在侧链上具有横向连接的液晶核的 Nouel 聚合物液晶的合成和热性能”分子晶体和液晶（正在出版）。

S.Takenaka and K.Yamasaki: "Synthesis and Thermal Properties of Novel Polymer Liquid Crystalshaving a Laterally-attached Liquid Crystalline Core at the Side Chain" Mol.Cryst.Liq.Cryst.(印刷中).

S.Takenaka 和 K.Yamasaki：“在侧链上具有横向连接的液晶核的新型聚合物液晶的合成和热性能”Mol.Cryst.Liq.Cryst.（印刷中）。

Shunsuke Takenaka: "Thermal Properties of Liquid Crystals harring an ω-Acryloyloxyofy-alkyl Group at the Lateral Position" Molecular Crystals and Liquid Crystals. (印刷中).

Shunsuke Takenaka：“在横向位置带有 ω-丙烯酰氧基烷基的液晶的热特性”分子晶体和液晶（正在出版）。