以N,N′-二(2-羟乙基)对苯二甲酰胺与己二酸及丁二醇缩聚,合成了同时带有端羧基与端羟基的聚酯酰胺预聚体,研究了不同扩链剂的扩链反应,获得了特性黏度达1.05 dL/g的聚酯酰胺.对预聚体及扩链后聚合物进行了红外与核磁表征,研究了聚合物的结构,并对聚合物进行了DSC与TG分析. Polycondensation of N, N’-bis (2-hydroxyethyl) terephthalamide with adipic acid and butanediol to synthesize polyesteramide prepolymer with terminal carboxyl groups and terminal hydroxyl groups was studied. Chain extender, the polyesteramide with the intrinsic viscosity of 1.05 dL / g was obtained.The infrared and nuclear magnetic properties of the prepolymer and the chain-extended polymer were studied, the structure of the polymer was studied, and the polymer DSC and TG analysis were performed.