【摘要】 本文合成了一系列刚性二胺改性HQDEA-ODA型聚醚酰亚胺,研究了它们对H₂、O₂和N₂三种气体的透过性能与分子结构之间的关系。结果表明,第二种二酐单体的结构对共聚醚酰亚胺的透气性能有很大的影响。当第二种二酐单体的含量占二酐单体总量的20%时,其聚醚酰亚胺的透氢系数和H₂/N₂分离系数均比均聚物HQDPA-ODA的高。更多还原

【Abstract】 Gas permeabilities and permselectvities for gas pairs H2/N2 and O2/N2 through a series of aromatic copolyetherimides, which were prepared from four different dianhydrides (e. g. HQDEA,PMDA,BPDA,and BTDA) and 4,4-oxydianiline (ODA),have been investigated at temperatures from ambient up to 150’C under 0. 7MPa. Replacement partly of HQDEA with rigid dianhydrides (PMDA and BPDA)or semirigid dianhydride (BPDA) generally increase H2 permeability and permselectivity for gas pairs H2/N2 and O2/N2. Among HQDEA/PMDA-ODA, HQDEA/BPDA-ODA, and HQDEA/BTDA-ODA, HQDEA/BTDA-ODA have the highest permeability, while HQDEA/BPDA-ODA have the highest permselectivity for gas pairs H2/N2 and O2/N2.更多还原