采用3,3',4,4'-联苯四酸二酐(3,3',4,4'-BPDA)和3种二胺,3,5-二氨基-4'-苯炔基二苯甲酮(DPEB)、4,4'-二氨基二苯醚(4,4'-ODA)及4,4'-二氨基二苯甲酮(4,4'-DABP),以苯酐(PA)为封端剂制备了不同比例的带苯炔侧基的聚酰亚胺薄膜,采用DMTA、TGA和力学性能测试等分析技术对侧链含苯乙炔基的聚酰亚胺膜的性能进行了表征.结果表明,随着苯炔基侧链DPEB含量的增加,固化后的DPEB/4,4'-ODA/3,3',4,4'-BPDA/PA聚酰亚胺薄膜的玻璃化转变温度由315.3℃升至354.0℃,拉伸强度由76.5 MPa提高至164.0 MPa,薄膜热重分析中温度在491.9~499.8℃之间质量损失为5%.固化后的DPEB/4,4'-DABP/3,3',4,4'-BPDA/PA聚酰亚胺薄膜的玻璃化转变温度由350.5℃变为379.2℃,薄膜拉伸强度也从106.5 MPa升到129.8 MPa,热重分析中温度在483.9~493.0℃之间质量损失为5%.
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