Guanidine and Amidine Organocatalysts for Ring-Opening Polymerization of Cyclic Esters
San Jose State University · University of South Dakota · +3 more institutions
Abstract
1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD), N-methyl-TBD (MTBD), and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) are effective organocatalysts for the ring-opening polymerization (ROP) of cyclic esters such as lactide (LA), δ-valerolactone (VL), and ε-caprolactone (CL). TBD is shown to polymerize LA, VL, and CL in a fast and controlled manner, whereas MTBD and DBU polymerized LA and addition of a thiourea cocatalyst led to the ROP of VL and CL being achieved. Each of the catalysts produced polymers displaying high end group fidelity, good correlation between theoretical and observed molecular weight, and linear relationships between conversion and molecular weight. The enhanced activity of TBD relative to MTBD and…
Citation impact
- FWCI
- 10.88
- Percentile
- 100%
- References
- 29
Authors
11- BGBas G. G. LohmeijerCorresponding
San Jose State University, University of South Dakota, Stanford University, University of Warwick, Kenyon College
- RCRussell C. Pratt
University of Warwick, San Jose State University, Stanford University, Kenyon College, University of South Dakota
- FAFrank A. Leibfarth
San Jose State University, Kenyon College, University of Warwick, Stanford University, University of South Dakota
- JWJ. Wells Logan
Stanford University, Kenyon College, San Jose State University, University of Warwick, University of South Dakota
- DADavid A. Long
University of South Dakota, Stanford University, Kenyon College, University of Warwick, San Jose State University
Topics & keywords
- Polymerization
- Benzyl alcohol
- Chemistry
- Thiourea
- Monomer
- Ring-opening polymerization
- Polymer chemistry
- Catalysis