4,4'-双(4-氨基苯氧基)联苯的合成及其聚酰亚胺薄膜的表面性能研究

4,4'-二羟基基联苯(44DHBP)、4-氯硝基苯(4CNB)和碳酸钾在N,N-二甲基甲酰胺(DMF)和甲苯的混合溶剂体系中回流反应,合成4,4'-双(4-硝基苯氧基)联苯(44B4NPOBP);随后,在Pd/C-水合肼的还原体系中,被进一步还原成4,4'-双(4-氨基苯氧基)联苯(44B4APOBP)。利用差示扫描量热计(DSC)、傅立叶转换红外光谱仪(FT-IR)等仪器,对其进行了表征。另外,将4,4'-双(4-氨基苯氧基)联苯(44B4APOBP)与均苯四甲酸二酐(PMDA)在强极性非质子有机溶剂中进行聚合反应,得到粘稠状的聚酰胺酸(44B4APOBP/PMDA-PAA)溶液,经涂膜、热亚胺化后,制成相应的聚酰亚胺(44B4APOBP/PMDA-PI)薄膜,并对其表面性能进行了研究。

Synthesis of 4,4'-Bis(4-aminophenoxy)Biphenyl and Study on the Surface Properties of the Polyimide Film Therefrom

The polyimide monomer of 4,4'-bis(4-aminophenoxy)biphenyl(44B4APOBP) was obtained through the reducing reaction of the 4,4'-bis(4-nitrophenoxy)biphenyl(44B4NPOBP) in the system of Pd/C-hydrazine hydrate.The compound of 44B4NPOBP was synthesized by the condensation between 4-chloronitrobenzene(4CNB) and 4,4'-dihydroxybiphenyl(44DHBP) in the presence of potassium carbonate in the mixture solvents of N,N-dimethylformamide(DMF) and tolune(Tol).Then,the obtained compounds were characterized by differential scanning calorimeter(DSC) and Fourier transfer infrared spectrometer(FT-IR).Moreover,the viscous polyamic acid(44B4APOBP/PMDA-PAA) solution was prepared by polycondesation reaction between 44B4APOBP and pyromelltic dianhydride(PMDA) in the polar aprotic organic solvent,and the corresponding polyimide(44B4APOBP/PMDA-PI) film was also obtained by thermal imidization of 44B4APOBP/PMDA-PAA thin layer.The surface properties of the film wasfurther studied.