合成了一系列三元和四元全芳族共聚酯,其链结构特征为有规交替地分布着对羟苯甲酰基(HB)单元。结构考察了HB在链中对共聚酯性能的影响,与不含HB的共聚物相比,发现其熔融温度下降,耐热性提高;液晶性不受损害;共聚物熔融时呈Schlieren或thred-like向列型织态结构;经熔融后冷却所得固态聚合物的激光小角光散射图象呈现明暗相间的斑纹。 A series of ternary and quaternary all-aromatic copolyesters were synthesized. The chain structure was characterized by the regular and alternating distribution of p-hydroxybenzoyl (HB) units. The structure of the copolymer investigated the effect of HB in the chain on the properties of the copolyester. Compared with the copolymer without HB, the melting temperature decreased and the heat resistance improved, the liquid crystallinity was not impaired, and the copolymer was Schlieren or thred -like nematic structure. The small-angle light scattering (SCD) image of the solid polymer obtained by the melting and cooling shows a light and dark speckle pattern.