Hyperbranched poly(glycolide) copolymers with glycerol branching points via ring-opening copolymerization
| Autor: | Anna M. Fischer, Christoph Schüll, Holger Frey |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Polymers and Plastics Comonomer Organic Chemistry Biodegradable polymer Ring-opening polymerization Polyester chemistry.chemical_compound End-group Monomer chemistry Polymer chemistry Materials Chemistry Copolymer Organic chemistry Two-dimensional nuclear magnetic resonance spectroscopy |
| Zdroj: | Polymer. 72:436-446 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2015.04.047 |
| Popis: | Sn(Oct) 2 -catalyzed synthesis of hyperbranched poly(glycolide) copolymers with glycerol branching points in the backbone is possible via ring-opening multi-branching copolymerization (ROMBP) of glycolide and 5HDON (5-hydroxymethyl-1,4-dioxan-2-one). Using this strategy, well-defined and soluble branched polyesters with apparent molecular weights (M n ) in the range of 1300–2000 g mol −1 and varying comonomer content (5HDON/glycolide = 30:70–70:30) were obtained. 2D NMR spectroscopy, thermal analysis and MALDI-TOF mass spectrometry confirmed the successful incorporation of both monomers and the resulting branched structure. Multiple end group functionality offers the possibility for further post-polymerization modification, rendering the materials interesting with respect to processing of PGA. Potential applications range from novel polyurethanes to biomedical purposes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect