A series of poly (2,5-diphenyl-1,3,4-oxadiazole) (POD) polymers, modified by copolymerization with diglycolic acid in PPA, have been prepared and characterized. The poly (2,5-diphenyl-1,3,4-oxadiazole) and its derivatives were then allowed to form membranes in phosphoric acid solution by phase inversion method. The polymer structures were determined by FTIR, and thermal stability were performed by using TGA. The crystallinity and orientation of polymer were determined by XRD. The morphology of both cross-section and surface of the membranes were further analyzed by SEM. Additionally, data of transmittance and fluorescence of the membranes were collected, as well as oxidation resistance and water absorption of the membranes were tested. The series of POD_X membranes obtained in this work exhibited good mechanical properties (up to 48 MPa), chemically inert and thermally stable, and are a class of membrane materials that could be potentially used under harsh conditions.

已经制备并表征了一系列通过与PPA中的二乙醇酸共聚改性的聚（2,5-二苯基-1,3,4-恶二唑）（POD）聚合物。然后通过相转化法使聚（2,5-二苯基-1,3,4-恶二唑）及其衍生物在磷酸溶液中形成膜。通过FTIR确定聚合物结构，并通过使用TGA进行热稳定性。通过XRD确定聚合物的结晶度和取向。通过SEM进一步分析膜的横截面和表面的形态。另外，收集膜的透射率和荧光的数据，以及测试膜的抗氧化性和吸水率。POD _X系列 通过这项工作获得的膜表现出良好的机械性能（最高48 MPa），化学惰性和热稳定性，并且是一类可在恶劣条件下潜在使用的膜材料。