中文摘要：

以丙三醇和马来酸酐为原料合成亲水性UV固化交联剂（丙三醇-马来酸酐低聚物）（ MLG-LY），以均苯四甲酸酐和乙醇胺为原料合成二羟基均苯酰亚胺（ HEPMI）；再以二环己基甲烷二异氰酸酯（ H12 MDI ）、六亚甲基二异氰酸酯（ HDI ）、聚氧化丙烯二醇（ PPG-600）、N-甲基二乙醇胺（ MDEA）、HEPMI、MLGLY 等为主要原料，制备了一系列聚酰亚胺改性阳离子型水性聚氨酯（ WPU）。讨论了HEPMI含量对WPU膜的力学性能和耐热性能的影响。结果表明，HEPMI含量增加能明显改善WPU膜的耐热性和力学性能。

英文摘要：

A new water-soluble UV-cured cross-linking agent glycerin-maleic （ MLGLY ） anhydride oligomer was synthesized by glycerol and maleic anhydride. Dihydroxy benzimide（ HEPMI） was synthesized by pyromellitic dianhydride and ethanolamine. Finally, a new polyimide modified cationic waterborne polyurethane （ WPU） was prepared by dicyclohexyl methane diisocyanate（ H12 MDI） , HEPMI, MLGLY, hexamethylene diisocyanate（ HDI） , polyoxypropylene propylene-glycol ether （ PPG-600 ） and N-methyldiethanolamine （ MDEA ） . Effect of HEPMI a-mount on mechanical and heat-resistance properties were discussed. It was found that the increasing of HEPMI a-mount improved the thermal stability and mechanical properties of WPU membrane.