Mokri, N., Oh, P., Mukhtar, H., & Chew, T. (2017). Synthesis of high molecular weight polyimide consisting hexafluoroisopropylidene moiety for gas separation. Journal of Mechanical Engineering and Sciences, 11(4), 3144–3151. https://doi.org/10.15282/jmes.11.4.2017.17.0283