Abstract
The thermal decomposition mechanism of polydimethyldiallylammonium chloride (PDMDAAC) was studied innovatively. The bond breaking sequence of PDMDAAC in thermal environment was evaluated by quantum chemical calculation, then thermal decomposition mechanisms of PDMDAAC were speculated which were clarified by TG-DSC-MS and FTIR. The TG-DSC curves showed PDMDAAC has two stages of thermal decomposition. B3LYP/6-31G* method was used to calculate the Ea (activate energy of the bond breaking) of each type of the bonds breaking. The simulation results indicated that C–N was the most easily broken bond in the cyclic five member ring, and the evaluated Ea was 184.23 kJ mol−1. The results illustrated that TG-DSC-MS and FTIR spectra verify the hypothesis that the ring C–N bond breaks firstly. The main gas products in the two stages of PDMDAAC thermal decomposition are NH2Cl and CH4, C2H2, C3H8, respectively.
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The authors are thankful for the financial support from the National Natural Science Foundation of China 51503100 and 21377054.
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National Natural Science Foundation of China (51503100 and 21377054).
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Jia, X., Xie, J., Zhan, X. et al. Thermal decomposition mechanism of poly(dimethyldiallylammonium chloride). J Therm Anal Calorim 147, 4589–4596 (2022). https://doi.org/10.1007/s10973-021-10860-w
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DOI: https://doi.org/10.1007/s10973-021-10860-w