刚性二酐改性HQDEA-ODA型聚醚酰亚胺的透气性能  

Investigation of Gas Permeability and Permselectivity of HQDEA—ODA Modified by Rigid Aromatic Dianhydride

作　　者：李悦生[1] 丁孟贤[1] 张劲[1] 徐纪平[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《膜科学与技术》1993年第3期47-51,共5页Membrane Science and Technology

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H_2、O_2、和N_2三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H_2/N_2分离系数均比均聚物HQDPA-ODA的高。Gas permeabilities and permselectvities for gas pairs H_2/N_2 and O_2/N_2 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℃ under 0.7MPa. Replacement partly of HQDEA with rigid dianhydrides (PMDA and BPDA)or semirigid dianhydride (BPDA) generally increase H_2 permeability and permselectivity for gas pairs H_2/N_2 and O_2/N_2. 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 H_2/N_2 and O_2/N_2.

关 键 词：聚醚酰亚胺 膜 气体 分离 透气 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]