%0 Journal Article %T Synthesis, characterization and gas separation properties of novel copolyimide membranes based on flexible etheric–aliphatic moieties %A Khoshkam Talkhonche, Milad %A Morteza Sadeghi %A Pourafshari Chenar, Mahdi %A Mahdi Naghsh %A Mohammad Jalil Namazi Fard %A Mohammad Reza Shafiei %J RSC Advances %@ 2046-2069 %D 2016