Solubility, thermal and photoluminescence properties of triphenyl imidazole-containing polyimides

Abstract

The triphenyl imidazole-containing polyimide films exhibit excellent solubility and thermal and photoluminescence properties.

Photoluminescence, thermal and surface properties of triarylimidazole-containing polyimide nanocomposite films

“…Hence, the PI(MPBAI-CBDA) film exhibits photoluminescence behavior under the excitation of ultraviolet light. 47 After respectively adding nano-SiO 2 , Al 2 O 3 and Si 3 N 4 , these nanocomposite films still exhibit photoluminescence performance. The photos taken in dark room and the fluorescence emission spectra are depicted in Fig.…”

“…1 gives the FTIR spectra of PI(MPBAI-CBDA) and nanocomposite films, from which there are three characteristic peaks of imide ring at 1780, 1712 and 1372 cm −1 , corresponding to the asymmetric and symmetric stretching vibration of C O group as well as the stretching vibration of C–N bond in the imide rings, respectively. 47 In addition, the vibration absorption peak of deformation for imide ring is observed at 720 cm −1 , and the C–O–C stretching absorption peak occurs around at 1245 cm −1 , which is assigned to the ether linkage in the PI backbone. Because the loading of nanoparticles was small, the chemical structures of the three ceramics nanofillers were not obviously reflected by the FTIR spectra.…”

“…According to our reported procedure, 47 the diamine MPBAI was synthesized and polymerized with alicyclic dianhydride CBDA to prepare the colorless and transparent PI film by thermal imidization. Next, the three series of nanocomposite films were fabricated by in situ polymerization using nano-SiO 2 , Al 2 O 3 and Si 3 N 4 as inorganic nanofillers.…”

Polyimide/crown ether composite film with low dielectric constant and low dielectric loss for high signal transmission

“…These characteristic peaks indicate that the polyimides have undergone a relatively complete imidization process. 29,30 By contrast, as shown in Fig. 2, the original characteristic peaks PI-1 of C]O at 720 and 1719 cm −1 demonstrate a shi to 716 and 1721 cm −1 , respectively.…”

“…These characteristic peaks indicate that the polyimides have undergone a relatively complete imidization process. 29,30…”