Mokri N, Oh P, Mukhtar H, Chew T. Synthesis of high molecular weight polyimide consisting hexafluoroisopropylidene moiety for gas separation. J. Mech. Eng. Sci. [Internet]. 2017 Dec. 31 [cited 2024 May 19];11(4):3144-51. Available from: https://journal.ump.edu.my/jmes/article/view/7864