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. 2023 Sep 1;145(36):19840–19848. doi: 10.1021/jacs.3c05863

Figure 3.

Figure 3

Data for Sn(Oct)2-catalyzed chemical recycling of PLLA to l-LA. (a) Arrhenius plot for PLLA depolymerizations allowing determination of the activation energy (Ea). Plot of ln(kobs) vs 1/T applies data collected at 160–180 °C; reactions repeated in triplicate; the errors are determined as the standard deviations of the mean. (b) Plots of PLLA mass loss vs time using various Sn(Oct)2 loadings. Experiments were conducted using 1:1000, 1:2000, 1:3000, 1:4000, 1:5000, and 1:6000 Sn:PLLA loadings, at 160 °C; reactions were repeated in triplicate. (c) Determination of the dependence of rate on catalyst concentration. Plots of ln(kobs) vs ln([Sn(Oct)2]0); the errors are determined from triplicate runs as the standard deviations of the mean. (d) Potential mechanism for Sn(Oct)2-catalyzed PLLA depolymerization.