A. A. Atamanova, K. T. Kalinin, A. P. Plakhov, A. A. Stupnikov, P. V. Dmitryakov, S. V. Korolev, N. G. Sedush
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Polymerization of D,L-lactide in the presence of biocompatible catalyst bismuth subsalicylate
Polymerization of D,L-lactide was performed in bulk at 160°C in the presence of bismuth (III) subsalicylate catalyst. Kinetics of the reaction was studied by differential scanning calorimetry in isothermal mode at 160°C and catalyst concentrations of 2500, 5000, and 7500 ppm. It was shown that the catalyst has a high activity: under this conditions an equilibrium conversion of 96% was achieved in 20–30 min, and the molecular weight of the resulting poly(D,L-lactide) reached 118 kDa.
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