Cyclic Polyester Formation with an [OSSO]‐Type Iron(III) Catalyst
| Autor: | Alfonso Grassi, Stefano Milione, Francesco Della Monica, Carmine Capacchione, Salvatore Impemba |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
cyclization
ring-opening polymerization General Chemical Engineering 02 engineering and technology 010402 general chemistry 01 natural sciences Ring-opening polymerization Catalysis chemistry.chemical_compound iron Polymer chemistry Environmental Chemistry General Materials Science polymers chemistry.chemical_classification Lactide Polymer 021001 nanoscience & nanotechnology homogeneous catalysis 0104 chemical sciences Polyester General Energy Monomer chemistry Polymerization 0210 nano-technology Cyclohexene oxide |
| Zdroj: | ChemSusChem. 13:141-145 |
| ISSN: | 1864-564X 1864-5631 |
| Popis: | The efficient formation of cyclic polyesters from the ring-opening polymerization of lactide, ϵ-caprolactone, and β-butyrolactone catalyzed by a 1,4-dithiabutanedyl-2,2'-bis(4,6-dicumylphenol) [OSSO]-FeCl complex activated with cyclohexene oxide was achieved. The catalyst was very active (initial turnover frequency up to 2718 h-1 ), robust, and worked with a monomer/Fe ratio up to 10 000. The formation of cyclic polymers was supported by using high-resolution matrix-assisted laser desorption ionization (MALDI) MS, and the average ring size (≈5 kDa for cyclic polylactide) independent of the reaction conditions. A monometallic ring-opening polymerization/cyclization mechanism was proposed from the results of a kinetic investigation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text