FTIR spectroscopic and conductivity study of the thermal degradation of polyaniline films

Spectroscopy analyses of polyurethane/polyaniline IPN using computational simulation (Amber, MM+ and PM3 method)

“…Table 5. 13 C-NMR experimental values of PANI [37][38][39] . were observed the energy for diverse models, proven that the reaction was carried out.…”

“…Tables 10 to 12 show FTIR spectra of 3 PU/PANI ratios, where, the characteristic bands of the hydrolysis were appreciated. From 1412 to 1370 cm -1 are attributed to the stretching C-OR, and from 1270 to 1200 cm -1 were assigned to the stretching of the bond C-OR of the urethane group formed by the hydrolysis [13,47] . Finally, it was appreciated that the degradation was made mainly on …”

“…The conductivity of conducting polymers can be tuned by chemical manipulation of the polymer backbone, by the nature of the dopant, by the degree of doping, and by blending with other polymers [1,2,11] . PANI is a kind of intrinsically conducting polymer consisting of phenylenediamine (PPD) and quinonediimine structure as shown in Figure 1 [12][13][14][15][16] . The morphology of PANI, granular or tubular, depends on the acidity conditions during the reaction rather than on the chemical structure of the acid [17] .…”

“…With advances in both computer and software technology, now it is possible to do quantum mechanical calculations or precise simulations on polymeric systems [30] . In this work, the computational analysis was applied to PU, PANI and PU/PANI (3 ratios), where Gibbs free energy, FTIR, 13 C-NMR, and molecular orbitals were calculated after the action of the urease enzyme.…”

Polyvinylidene fluoride (PVDF)/polyacrylonitrile (PAN)/carbon nanotube nanocomposites for energy storage and conversion

“…The peaks at 1700 cm −1 and 1560 cm −1 are corresponded to carbonyl groups of COOH and the C = C stretch of the COOH in MWCNTs respectively [33]. Characteristic peak at 2214 cm −1 is due to the stretching vibration of the cyano group (-CN), 1454 cm −1 for (-CH 3 ) and 1373 cm −1 (-CH 2 ), which can be observed in PAN [34]. In addition, FTIR spectra of composites show bands around 1140-1180 cm −1 and 1411-1419 cm −1 , which are corresponding to the CF 2 bending and CH 2 stretching mode [35], respectively.…”