2-(4-aminophenyl)-5-aminobenzimidazole(APBIA)and bisphenol diether dianhydride(BPADA)were homopolymerized in N,N-dimethylacetamide(DM AC),and then imidized chemically to obtain a soluble polyimide resin solution,then adding ethanol into powders in a high-pressure homogenizer,the structure,thermal stability and mechanical properties of the polyimide were studied after filtering,washing and drying.The results showed that the introduction of 1H-benzimidazole group improved the heat resistance of the polyimide,and the introduction of bisphenol diether dianhydride unit improved the solubility and toughness of the polyimide,it is a new type of polyimide material with both solubility and mechanical properties.
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