聚酯是合成纤维中最重要的一类高分子材料。深入、定量地研究有机溶剂-聚酯体系的热力学性质及其作用规律,对发展以溶剂为介质的染整加工工艺以及聚酯的改性、新品种的开发,有着重要的现实意义。例如,用二甲基甲酰胺处理PET纤维,可使PET纤维具有真丝的光泽和风格,并能显著改善其可染性。 Polyester is the most important type of polymer in synthetic fibers. In-depth and quantitative study of the thermodynamic properties of organic solvent-polyester system and its law of action have important practical significance for the development of solvent-based dyeing and finishing processes, as well as the modification of polyester and the development of new varieties. For example, treatment of PET fibers with dimethylformamide gives the PET fibers silk luster and style, as well as significantly improves their dyeability.