为开发高吸湿的改性聚酯纤维，以6-氨基-1-己醇和对苯二甲酸（PTA）为单体、钛酸四正丁酯为熔融聚合催化剂，采用二次加料一锅法和一次加料一锅法分别合成高分子量半芳族聚酯酰胺P6T6T和P6T，并对其化学结构、热性能、结晶性能和亲水性能进行系统评价。结果表明：加料方式的不同导致P6T6T和P6T在结构及性能上存在一定差别，其熔点分别为220 ℃和217 ℃，玻璃化转变温度分别为88 ℃和85 ℃，5%失重热分解温度分别为380 ℃和375 ℃，饱和吸水率分别为2.72%和3.49%（约为PET的3~4倍）。结果表明，P6T6T和P6T均具有优异的热学性能和亲水性能，不仅适用于工程塑料，还有望开发为高吸湿纤维。

In order to develop highly hygroscopic modified polyester fibers, 6-amino-1-hexanol and terephthalic acid (PTA) were used as monomers, and titanium tetra-n-butoxide was used as a melt polymerization catalyst. The high molecular weight semi-aromatic polyester amides P6T6T and P6T were synthesized by a two-step feeding one-pot method and a one-step feeding one-pot method, respectively. The chemical structures, thermal properties, crystallization properties and hydrophilic properties of P6T6T and P6T were evaluated. The results showed that the different feeding methods led to certain differences in the structure and properties of P6T6T and P6T. The melting points of P6T6T and P6T were 220 ℃ and 217 ℃ respectively, the glass transition temperatures were 88 ℃ and 85 ℃ respectively, the 5% weight loss thermal decomposition temperatures were 380 ℃ and 375 ℃ respectively, and the saturated water absorption rates were 2.72% and 3.49% (about 3 to 4 times that of PET) respectively. The results indicate that both P6T6T and P6T have excellent thermal and hydrophilic properties, which are not only suitable for engineering plastics, but also have the potential to be developed into highly hygroscopic fibers.