中文摘要：

分别采用甲基丙烯酸甲酯（MMA）、甲基丙烯酸丁酯（BMA）、甲基丙烯酸十二烷基酯（DMA）与带有双键封端的水性聚氨酯共聚,制得甲基丙烯酸酯改性水性聚氨酯（WPUA）乳液,采用浇注法制得WPUA膜,合成了系列不同烷基侧链甲基丙烯酸酯共聚改性水性聚氨酯膜.改性后膜的热稳定性提高;对WPUA膜渗透汽化苯/环己烷（质量比5/95）混合液结果表明：随着甲基丙烯酸酯共聚物侧链的增长,渗透通量提高,但分离因子有所降低,WPU-MMA膜与WPU-BMA膜的分离选择性较好,改性膜的渗透汽化活化能从25.86kJ/mol增加到31.24kJ/mol,苯和环己烷的渗透活化能均增大,且环己烷渗透活化能均高于苯的渗透活化能.

英文摘要：

Methyl methacrylate （MMA）, butyl methacrylate （BMA） and dodecyl methacrylate （DMA） were copolymerized with 2-hydroxyethyl acrylate （HEA）-terminated polyurethane to obtain n-alkyl methacrylate modified waterborne polyurethane（PU） emulsions. WPUA membranes were then prepared by casting the emulsions and drying at room temperature, then drying in vacuum oven for 10 hours. The experimental results show that the thermal stability of the modified membranes was improved. The investigation on the pervaporation performance of the modified WPU membranes for benzene/cyclohexane （mass ratio 5/95） showed that the flux of membranes increased with the increasing of side-chain length of the copolymerized n-alkyl methacrylate, but the separation factor decreased slightly （the separation factor of WPU-MMA and WPU-BMA membranes was higher）. The activation energy of WPUA membranes increased from 25. 86 kJ/mol to 81.24 kJ/mol corresponding to the WPU-MMA and WPU-DMA. The pervaporation activation energy of benzene and cyclohexane increased with side-chain length of eopolymers increased. It was more apparent for the cyclohexane.