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- Title
Ring-opening polymerization by N-heterocyclic carbenes as catalysts: Characteristics and kinetics.
- Authors
Wang, Y.; Li, N.; Zhang, L.; Guo, J.; Liu, Q.
- 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]/[M]) 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.
- Subjects
RING-opening polymerization; HETEROCYCLIC compounds; CARBENES; CHEMICAL kinetics; BENZYL alcohol; ESTERS
- Publication
Kinetics & Catalysis, 2014, Vol 55, Issue 4, p416
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158414040168