Syntheses of Novel Side-chain Liquid Crystalline Ionomers and Measurements of Electro-rheological Effect of the Ionomers

新型侧链液晶离聚物的合成及其电流变效应的测量

• 批准号: 15560013
• 负责人: NAKAMURA Naotake
• 金额: $ 2.37万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560013/
• 关键词: Liquid Crystal; Polymer Liquid Crystal; ionomer; Electro-rheological Effect; Dielectric anisotropy; ER効果

Side-chain polymer liquid crystals in which no metal ions were included were synthesized and its electro-rheological measurements were carried out. The polymers had siloxane chain as a backbone and had mesogenic groups having positive dielectric anisotropy in the side-chain. All samples synthesized here showed liquid crystallinity. One of them indicated remarkable electro-rheological effect. The results obtained were presented at a few meetings and conferences.Side-chain liquid crystalline ionomers were synthesized. In order to prevent the difficulties of the purification, terminal carboxylic groups in the side-chain were changed into ethyl ester ones. Metal ions were introduced at the ester parts by alkaline hydrolysis. Finally three samples having different contents of the metal ions were obtained.No electro-rheological measurements were made. The measurements will be performed in a next research program.

合成了不含金属离子的侧链聚合物液晶，并对其进行了电流变测量。聚合物具有硅氧烷链作为主链，并且在侧链中具有具有正介电各向异性的介晶基团。在此合成的所有样品均显示出液晶性。其中一种表现出明显的电流变效应。合成了侧链液晶离聚物。为了避免纯化困难，将侧链末端羧基改为乙酯基。通过碱水解在酯部分引入金属离子。最后得到了三种不同金属离子含量的样品，没有进行电流变测量。测量将在下一个研究项目中进行。