Abstract
In this work catalytic ring-opening polymerization of cyclic esters in THF in the presence of benzyl alcohol is described. The polymerization is catalyzed by 1,3-bis(4-methoxyphenyl)imidazolium carbene, N-heterocyclic carbene (NHC). The ability of two different monomers, ɛ-caprolactone and L-lactide, to enter into the polymerization via ring-opening polymerization with NHCs as catalysts was evaluated. The plot of ln([M]0/[M]t) versus reaction time yielded a straight line indicating that the kinetics of polymerization of ɛ-caprolactone and L-lactide was first-order in monomer concentration. Moreover, a direct relation between the rate of ring-opening polymerization of ɛ-caprolactone and the catalyst concentration suggested a first-order dependence of the rate of polymerization on the catalyst concentration.
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Wang, Y., Li, N., Zhang, L. et al. Ring-opening polymerization by N-heterocyclic carbenes as catalysts: Characteristics and kinetics. Kinet Catal 55, 416–421 (2014). https://doi.org/10.1134/S0023158414040168
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DOI: https://doi.org/10.1134/S0023158414040168