Synthesis and Properties of High Performance Functional Polyimides Containing Rigid Nonplanar Conjugated Fluorene Moieties. - Liu, Yi-Wu; Tang, Li-Shuang; Qu, Lun-Jun; Liu, Si-Wei; Chi, Zhen-Guo; Zhang, Yi; Xu, Jia-Rui (Chinese Journal of Polymer Science (Springer Science & Business Media B.V.), 2019)