Studies on Semi-Rigid Main-Chain Liquid Crystalline Polymers Composed of Symmetric Aromatic Diimides

对称芳香族二酰亚胺半刚性主链液晶聚合物的研究

• 批准号: 10650868
• 负责人: SATO Moriyuki
• 金额: $ 2.37万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650868/
• 关键词: Symmetric Aromatic Diimide; Main-Chain Liquid Crystalline Polymer; Liquid Crystallinity; p-Terphenyldiimide; Biphenyldiimide; Smectic Phase; Nematic Phase; Miscibility Test; サーモトロピック液晶相; サーモトロピック中間相

It is known that polymers composed of symmetric aromatic diimides form no liquid crystalline (LC) phases in many cases, but those containing asymmetric diimides have a tendency to show LC melts. In this work, poly(imide-carbonate)s and poly(ester-imide)s, which are constituted of symmetric p-terphenyldiimide and biphenyldiimide units, were prepared and the thermal and mesomorphic properties were investigated in order to disclose the relationship between polymer structures and LC properties. Homo-and copoly(imide-carbonate)s or homo- and copoly(ester-imide)s were synthesized by melt polycondensation of diols of biphenyldiimide and p-terphenyldiimide, which were derived from the corresponding dianhydrides and aminoalcohols, with diphenyl carbonate or diesters of the diimides prepared from aminocarboxylic acids. DSC measurements, polarizing microscope observations of textures, temperature-variable X-ray analyses and miscibility tests showed that the polymers having even methylene chains form enantiotropic LC phases in spite of absence of traditional mesogens such as biphenyl unit. The p-terphenyl-diimide-rich copolymers showed smectic and nematic phases. It is considered that the poly(ester-imide)s have better LC properties than the analogous poly(imide-carbonate)s.

已知由对称芳族二酰亚胺组成的聚合物在许多情况下不形成液晶（LC）相，但含有不对称二酰亚胺的那些聚合物具有显示LC熔融的趋势。本工作制备了由对称的对三联苯二酰亚胺和联苯二酰亚胺单元构成的聚（酰亚胺-碳酸酯）和聚（酯-酰亚胺），并对其热性能和液晶性能进行了研究，以揭示聚合物结构与液晶性能之间的关系。由联苯二酰亚胺和对三联苯二酰亚胺的二醇与碳酸二苯酯或由氨基羧酸制得的二酰亚胺的二酯熔融缩聚，合成了均聚和共聚（酰亚胺-碳酸酯）或均聚和共聚（酯-酰亚胺）。DSC测试、偏光显微镜观察、变温X射线衍射分析和结晶性测试表明，尽管不含联苯基等传统液晶基元，但含有均匀亚甲基链的聚合物仍能形成各向异性液晶相。富含对三联苯二酰亚胺的共聚物表现出近晶相和双晶相。研究结果表明，聚酯酰亚胺的液晶性能优于类似的聚酯酰亚胺碳酸酯。

项目成果

M.Sato and A.Kogawa: ""Thermotropic semi-rigid copoly-(imide-carbonate)s composed of 3, 4, 3", 4"-p-terphenyltetra-carboxdiimide and 3, 4, 3', 4'-biphynyltetracarboxdiimide rings""Liq. Cryst.. (in press).

M.Sato 和 A.Kokawa：“由 3, 4, 3”, 4”-对三联苯四甲二亚胺和 3, 4, 3, 4- 组成的热致半刚性共聚（酰亚胺-碳酸酯）

M. Sato, S. Ujiie, Y. Tada and T. Kato: "Semirigid homo- and copoly (imide-carbonate)s based on 3,4,3",4",-p-terphenyltetracarboxdiimide"High Perform. Polym.. 10. 155-162 (1998)

M. Sato、S. Ujiie、Y. Tada 和 T. Kato：“基于 3,4,3",4",-p-三联苯四甲二亚胺的半刚性均聚和共聚（酰亚胺碳酸酯）”高性能。

M.Sato and N.Tanino: "Synthesis and liquid crystallinity of poly(ester-imide)s composed of biphenyltetracarboxdiimide and aliphatic spacers"The 49th Meeting of Polymer Science of Japan. (to give a lecture.).

M.Sato 和 N.Tanino：“由联苯四甲酰亚胺和脂肪族间隔基组成的聚（酯-酰亚胺）的合成和液晶性”第 49 届日本高分子科学会议。

M. Sato and A. Kogawa: "Preparation of semi-rigid homopoly (imide-carbonate)s composed of symmetric diimide units using diphenyl"Polymer J..

M. Sato 和 A. Kokawa：“使用联苯制备由对称二酰亚胺单元组成的半刚性均聚物（酰亚胺-碳酸酯）”Polymer J..

M.Sato and A.Kogawa: "Preparation of semi-rigid homopoly-(imide-carbonate)s composed of symmetric aromatic diimide units using diphenyl carbonate and their mesomorphic properties"Polym. J.. (to be submitted).

M.Sato 和 A.Kokawa：“使用碳酸二苯酯制备由对称芳香族二酰亚胺单元组成的半刚性均聚（酰亚胺碳酸酯）及其介晶性质”Polym。