Catalysis in polymerization of cyclic esters. Catalyst and initiator in one molecule. Polymerization of lactide

Lewiński, Piotr; Kałużyński, Krzysztof; Pretula, Julia; Mielniczak, Grażyna; Penczek, Stanisław

doi:10.1016/j.jcat.2021.11.038

Cited by 6 publications

(2 citation statements)

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“…PVL and PCL were also prepared using t -BuP 4 as a catalyst and BnOH as an initiator. We found that the rate of consumption of CL is lower than that of VL ( Table 1 ), which is consistent with other ROP situations involving VL and CL [ 34 , 35 , 36 , 37 , 38 , 39 ].…”

Section: Resultssupporting

confidence: 90%

“…(●) while the values of Ð remains stable (~1.15) during the polymerization process. Figure 4 b shows that the monomer conversion and polymerization time represent the typical kinetic nature of the first-order polymerization, which not only indicates the stable consumption of monomer during the ROP but also further confirms the living feature of the t -BuP 4 -catalyzed ROP of TMC [ 37 , 38 , 39 ].…”

Section: Resultsmentioning

confidence: 66%

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Ring-Opening Polymerization of Trimethylene Carbonate with Phosphazene Organocatalyst

Zhu

2023

Polymers

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Aliphatic polycarbonate (APC) compounds are an important class of biodegradable materials with excellent biocompatibility, good biodegradability, and low toxicity, and the study of these compounds and their modification products aims to obtain biodegradable materials with better performance. In this context, the ring-opening polymerization (ROP) of trimethylene carbonate (TMC) from a low nucleophilic organic superbase of phosphazene (t-BuP4) as a catalyst and benzyl alcohol (BnOH) as an initiator at room temperature was carefully studied to prepare poly(trimethylene carbonate) (PTMC) which is one of the most studied APC. 1H NMR and SEC measurements clearly demonstrate the presence of a benzyloxy group at the α-terminus of the obtained PTMC homopolymers while investigation of the polymerization kinetics confirms the controlled/living nature of t-BuP4-catalyzed ROP of TMC. On the basis of this, the block copolymerization of TMC and δ-valerolactone (VL)/ε-caprolactone (CL) was successfully carried out to give PTMC-b-PCL and PTMC-b-PVL copolymers. Furthermore, PTMC with terminal functionality was also prepared with the organocatalytic ROP of TMC through functional initiators. We believe that the present ROP system is a robust, highly efficient, and practical strategy for producing excellent biocompatible and biodegradable PTMC-based materials.

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