Enhanced mechanical and electrical properties of polyimide film by graphene sheets via in situ polymerization

Advanced anticorrosive coatings prepared from electroactive polyimide/graphene nanocomposites with synergistic effects of redox catalytic capability and gas barrier properties

“…Finally, the new peaks at 1373 and 740 cm -1 can be explained by C-N stretching and imide ring, respectively. The characteristic absorption band found at 740 cm -1 was the result of the deformation of the imide groups, as shown in Figure 3 curves b and c. These changes in the characteristic peaks of ACAT-based EPAA, EPI, and EPGN indicate that EPAA was almost completely converted into the corresponding ACAT-based EPI and EPGN through the thermal imidization process at 200°C [18,36,37]. Moreover, comparison of the two curves of the EPI and EPGN materials, no obviously different absorption peak is observed, probably because of the low amounts of graphene present in the samples [38].…”

Graphene-Based Polymer Nanocomposites: Chemistry and Applications

“…In situ polymerization begins with the dispersion of graphene or modified graphene into the monomer matrix, followed by a polymerization process in the presence of a suitable initiator [29,164,165]. In situ polymerization is an easy approach to prepare polyimide films containing functionalized graphene sheets, which demonstrated the improvements in both electrical conductivity and mechanical properties [85]. Graphene/carbon nanotube/polystyrene hybrid nanocomposites prepared by water-based in situ microemulsion polymerization were used as filler in a host polystyrene matrix to form composite films; the process improves the mechanical and thermal properties compared with the neat polymer [96].…”

Synthesis and characterization of branched phenylethynyl-terminated polyimides

“…[1][2][3][4][5][6][7][8][9][10]. However, due to their rigid backbone, strong hydrogen bonding and the formation of charge transfer complex, polyimides are usually insoluble in most organic solvents, and are hard to process because of their relatively high softening temperature [11].…”