由DDBT二胺和DSDA二酐单体进行缩聚反应制备了新型可溶性聚酰亚胺DSDA-DDBT.用IR、热力学分析等手段对聚酰亚胺进行了表征,研究了聚酰亚胺膜对苯和环己烷的吸附性能、渗透汽化分离苯/环己烷混合体系的性能,以及温度、混合物组成对分离性能的影响.DSDA-DDBT在分离苯/环己烷混合体系时对于苯有良好的选择透过性能.323 K时,含苯57.8%的苯/环己烷体系,分离系数可达到26,渗透通量Q1为0.4 kg*μm/m2 h.
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