合成了3种含三氟甲基的芳香二胺,进而与3,3',4,4'-联苯四甲酸二酐(BPDA)缩聚,得到3种对苯醚型含氟聚酰亚胺薄膜,并由4,4'-二氨基二苯醚(4,4'-ODA)与BPDA缩聚得到聚酰亚胺薄膜.对4种聚酰亚胺薄膜的水蒸汽透过率、吸水性和热学性能的测试结果表明,其中聚合物PI-1(2,2'-BTF-4,4'-BADE+BPDA; BTF:双三氟甲基;BADE:二氨基二苯醚)的水蒸汽透过率为7.70 g/(h·m2),吸水率为0.67%,玻璃化转变温度为259.74℃,质量损失5%的温度为521.40℃,具有良好的水蒸汽透过性和低吸水性.
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