The polyester can be modified by introducing amide group in macromo-lecular chains to improve its moisture absorption as well as melting behavior.

• 在聚酯中引入酰胺基可制得多种类型的改性聚酯,如提高模量,增加原聚酯的吸湿性,改善熔融行为等,并可制得弹性纤维。