Theoretical and experimental studies on the thermal decomposition of 1-butyl-3-methylimidazolium dibutyl phosphate

Fully Bio-Based Phytic Acid–Basic Amino Acid Salt for Flame-Retardant Polypropylene

“…For these spectra, the peaks at 3433 and 1631 cm –1 correspond to N–H and CC; another two peaks at 1197 and 997 cm –1 are ascribed to P–O–P . For the infrared spectra of PaHis at different temperatures, there is an obvious peak at 890 cm –1 , which belongs to the C–H in the imidazole ring group . Clearly, some chemical structures in the residue of PaHis are different from those in the residues of PaArg and PaLys.…”

“…50 11 In addition, two peaks at 3431 and 2927 cm −1 are ascribed to N−H and C−H. 28,52 The appearance of these structures mentioned above indicates that the N and P in the phytic acid−amino acid salts affected the structure of the formed condensed phase, which might contribute to the formation of stable char layers. 48 In addition, the peak at 1636 cm −1 is from the stretching vibration of CC, indirectly illustrating that the amino acid−phytic acid salts might promote the aromatization of PP.…”

“…As displayed in Figure , the oxygen contents of PaArg, PaLys, and PaHis reduces after the thermal treatment at 600 °C, among which the oxygen content of PaLys is the highest; after treating at a high temperature, the nitrogen contents of the residues of PaArg and PaHis significantly reduce. For PaArg, the reason for the reduction in nitrogen content should be because of the release of inert gases such as ammonia and nitrogen-containing structures, while the reduction in nitrogen content for PaHis should be because of the release of imidazole ring derivatives . The phosphorus content of the residue for PaArg and PaHis increases to a certain extent after treating at 600 °C, while the phosphorus content of the residue of PaLys decreases slightly, indicating that phosphorous-containing radical groups were produced and entered the gas phase at high temperatures.…”

“…11 For the infrared spectra of PaHis at different temperatures, there is an obvious peak at 890 cm −1 , which belongs to the C−H in the imidazole ring group. 52 Clearly, some chemical structures in the residue of PaHis are different from those in the residues of PaArg and PaLys. According to the analysis presented above, the thermally stable imidazole ring did not efficiently improve the strength of the formed residues of PaHis and its flame-retardant PP.…”

Thermal Stability and Decomposition Kinetics of 1-Alkyl-2,3-Dimethylimidazolium Nitrate Ionic Liquids: TGA and DFT Study

“…However, due to the high complexity and diversity of the structure of ionic liquids, it is necessary to study its structural characteristics and intermolecular forces [ 24 , 25 , 26 ]. Li et al analyzed and calculated the hydrogen bonds, intermolecular forces, bond energies and activation energies of [Bmim][DBP] by using B3LYP/6–311++G (d,p) and M06–2X/6–311++G(d,p) levels of calculation [ 27 ]. Nie et al used a combination of initio calculations, molecular dynamics simulations, Born–Haber cycle analysis and iso-chain reactions to find that all ion pairs can form strong hydrogen bonds, and the interaction is determined by the side-chain structure and functional groups of amino acid anions [ 28 ].…”