Synthesis and characterization of a phosphonated graft copolyimide for direct methanol fuel cells application

Nanofibre preparation of non-processable polymers by solid-state polymerization of molecularly self-assembled monomers

“…In addition, new absorptions at 1578 and 1285 cm -1 were also observed, these peaks correspond to C=N and C-N-H in the imidazole ring, respectively 6 , indicating the formation of a benzimidazole structure (molecule C, Figure S4a). In addition, the formation of end dianhydride groups is indicated by characteristic peaks at 1780 cm -1 (asymmetric vibrations of C=O) and 1742 cm -1 (symmetric vibrations of C=O) 3 Hence, neat BBB nanofibres could be obtained by the heat treatment of PNDS/PVP above 460°C (see experimental details described in the main text) because the NTCA and DAB could be completely converted into BBB at temperatures above 250°C and PVP could be completely decomposed at temperatures above 460°C. WDK, Japan), a digital camera, software for data acquisition and processing and a computerized control system.…”