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利用先合成复合单体,然后进行溶液缩聚的方法制备了含三芳香酯介晶单元组的芳脂族规则共聚酯,介晶单元的中心苯环分别为氯代/甲基取代/苯基取代。用热台偏光显微镜、DSC和X射线衍射研究了所得共聚酯的液晶行为,并重点研究了取代基对相变温度及液晶态稳定性的影响。
The araliphatic regular copolyesters containing tri-aromatic ester mesogen units were prepared by synthesizing the complex monomer and then polycondensation in solution. The central benzene rings of the mesogen units were chloro / methyl-substituted / phenyl replace. The liquid crystal behavior of the obtained copolyester was studied by hot stage polarizing microscope, DSC and X-ray diffraction. The effects of substituents on the phase transition temperature and the liquid crystal phase stability were also studied.