将2种主链中含有酯基结构的二胺单体:二(4-氨基苯基)对苯二甲酸酯(BPTP)和4-氨基苯基-4-氨基对苯甲酸酯(APAB),与几种常见的酸酐聚合,合成了一系列主链中含有酯基结构的新型聚酰亚胺膜材料.结果表明,所制备的聚酰亚胺薄膜表现出优良的热稳定性、机械性能和低吸水性,其中聚合物的表观玻璃化转变温度高达526℃,在空气和N2气气氛下5%的热失重温度分别在498和507℃以上,表明薄膜具有非常优异的热性能.由于聚合物主链中引入酯基结构而表现出低的线膨胀系数和吸水率.
Two series of new diamine monomer containing ester structure named bis (4-aminophenyl) terephthalate (BPTP) and 4-aminophenyl-4'-aminophenylbenzoate( APAB ) in the main-chain were introduced in this paper. A variety of poly ( ester imide) s (PEIs) was prepared using BPTP and APAB with some commercial dianhydrides. A series of poly( ester imide)s was synthesized. By the test of the thermal stability and mechanical properties, the polymers show excellent thermal stability, mechanical properties, low water absorption Due to the introduction of the ester structure in the main chain, the polymer show a low linear coefficient thermal expansion(CTE) and water absorption.