writer：Lala Rukh Sidra, Nafeesa Mushtaq, Guofei Chen,* Xingzhong Fang.*
keywords：Poly(N-arylene benzimidazole ether imide), C–N/C–O coupling reaction, aromatic nucleophilic substitution polymerization
source：期刊
specific source：High Perform. Polym.
Issue time：2018年

A series of poly(N-arylene benzimidazole ether imide) copolymers PEIBIs were prepared from 1H,30H-5,50-bisbenzimidazole, bisphenol-A and 4,40-bis(4-fluorophthalimido)diphenyl ether by nucleophilic displacement polymerization. The resulting copolymers PEIBI(10–90) demonstrated moderate to good solubility in polar aprotic solvents and high glass transition temperatures (Tgs) of 228–336C, good thermal stability with 10% weight loss temperatures in the range of 503–548C. All copolymer films showed good mechanical properties with tensile strengths of 101–130 MPa, tensile moduli of 3.3–4.0 GPa, elongations at break of 5–7%, and also presented low water uptake (0.15–0.34%). The wide-angle X-ray diffraction results revealed the amorphous nature of copolymers. The copolymer PEIBI-80 showed good balance in solubility, thermal and mechanical properties.