Affiliation:
1. State Key Laboratory of Environment‐friendly Energy Materials & School of Materials and Chemistry Southwest University of Science and Technology Mianyang People's Republic of China
2. National Engineering Technology Center for Insulation Materials Mianyang People's Republic of China
Abstract
AbstractThe cation‐π cross‐linked heat‐resistant K‐poly(N‐aryleneindole sulphone) PINSU film, which has a high glass transition temperature (Tg = 268°C) and a decomposition temperature (Td = 547°C), was prepared by soaking PINSU film in alkaline aqueous solutions. Compared with the linear polymer PINSU, the Tg and Td of the K‐PINSU were significantly enhanced. The dynamic cation‐π cross‐linking can be reversibly removed and reconstructed driven by external stimulations in the polymer network, which endows the cross‐linked K‐PINSU with cyclable behavior and excellent mechanical stability. In addition, we have successfully demonstrated that the Tg of the K‐PINSU can be nondestructively detected by monitoring the changes in fluorescence intensity.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Sichuan Province