氢键自组装侧链液晶聚合物的制备及性能

为了获得氢键自组装液晶聚合物,制备了两种单体M1和M2,通过调节单体M1和M2的摩尔比,利用氢键自组装方法制备得到了一系列侧链液晶聚合物.利用红外光谱仪(FTIR)、差示扫描量热仪(DSC)和偏光显微镜(POM)测试了氢键自组装侧链液晶聚合物的液晶性能.结果表明,P3和P5液晶聚合物在2 510 cm-1和1 920 cm-1处出现了氢键的吸收峰,而P3、P4和P5液晶聚合物均具有两个熔融吸收峰.P1~P5液晶聚合物具有Grandjean织构,为典型的胆甾相;P6液晶聚合物具有明显的球形织构,为典型的向列相.

Preparation and properties of hydrogen-bonding self-assembly side-chain liquid crystalline polymers

In order to obtain the hydrogen-bonding self-assembly liquid crystalline polymer, two monomers M₁ and M₂ were prepared, and a series of side-chain liquid crystalline polymers were prepared with the hydrogen-bonding self-assembly method through adjusting the molar ratio of M₁ and M₂ monomers. The liquid crystalline properties of hydrogen-bonding self-assembly side-chain liquid crystalline polymers were investigated with infrared spectroscopy(FTIR), differential scanning calorimeter(DSC)and polarized light microscope(POM). The results show that the hydrogen-bonding absorption peaks of P₃ and P₅ liquid crystalline polymers appear at 2 510 cm^-1 and 1 920 cm^-1, and the P₃, P₄ and P₅ liquid crystalline polymers have two melting absorption peaks. The P₁ to P₅ liquid crystalline polymers have Grandjean texture, and are the typical cholesteric phases, while the P₆ liquid crystalline polymer has obvious spherical texture, and is the typical nematic phase.