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. 2021 Mar 10;13(6):852. doi: 10.3390/polym13060852

Figure 7.

Figure 7

13C-NMR spectrum of (a) TBAB, and (b) trimethylamine as a byproduct or the TBAB+CO2 reaction in absence of ELO at 120 °C, 90 psi, and 48 h.