低沸点共溶剂对聚酰亚胺溶解性的影响

Study on the effect of low boiling cosolvent on PI solubility

以1,4-双(2′-三氟甲基-4′-氨基苯氧基)苯(6FAPB)和3,3′,4,4′-二苯醚四酸二酐(ODPA)为原料,N,N-二甲基乙酰胺(DMAc)为第一溶剂,丙酮为共溶剂,配制6种成分配比不同的制膜溶剂,然后采用热亚胺化法制成了6种聚酰亚胺薄膜。采用傅里叶红外光谱对其结构进行表征,并对其表面形貌、溶解时间、拉伸强度和热性能进行测试。结果表明:溶剂中添加丙酮制出来的薄膜,在有机溶剂中的溶解时间有着较大的区别。

1,4-bis(2′-trifluoromethyl-4′-aminophenoxy)benzene(6FAPB)and 3,3′,4,4′-diphenyl ether tetracarboxylic dianhydride(ODPA)used as raw materials,N,N-dimethylacetamide(DMAc)as the first solvent,acetone as the cosolvent,and six kinds of film-forming solvents having different distribution ratios were prepared,then six kinds of PI films were prepared by thermal imidization.The structure was characterized by fourier transform infrared spectroscopy,and its surface morphology,dissolution time,tensile strength and thermal properties were tested.The results shown that the dissolution time of the film prepared by adding acetone in the solvent had a big difference.