writer：Kai Ma, Guofei Chen,* Wei Wang, Anjiang Zhang, Yingying Zhong, Yajie Zhang, Xingzhong Fang,*
keywords：bio-based diamines, 2,5-furandicarboxylic acid, high performance polymers, polyimides, structure-property relations
source：期刊
specific source：J. Polym. Sci. Part A: Polym. Chem.
Issue time：2018年

Two novel bio-based diamines are synthesized through introduction of renewable 2,5-furandicarboxylic acid (2,5-FDCA), and the corresponding aromatic polyimides (PIs) are then prepared by these diamines with commercially available aromatic dianhydrides via two-step polycondensation. The partially bio-based PIs possess high glass transition temperatures

(Tgs) in the range from 266 to 364 8C, high thermal stability of 5% weight loss temperatures (T5%s) over 420 8C in nitrogen and outstanding mechanical properties with tensile strengths of 79–138 MPa, tensile moduli of 2.5–5.4 GPa, and elongations at break of 3.0–12.3%. Some colorless PI films (PI-1-b and PI-1-c) with the transmittances at 450 nm over 85% are prepared. The overall properties of 2,5-FDCA-based PIs are comparable with petroleum-based PI derived from isophthalic acid, displaying the potential for development of innovative

bio-based materials.