Catalyst-Free Ring Opening Synthesis of Biodegradable Poly(ester-urethane)s Using Isosorbide Bio-Based Initiator
| Autor: | Malek M'sahel, Ayoub El Mahdi, Raouf Medimagh |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Isosorbide Polymers and Plastics Organic Chemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Elastomer 01 natural sciences Ring-opening polymerization 0104 chemical sciences Polyester Differential scanning calorimetry Polymerization chemistry Polymer chemistry Materials Chemistry medicine Molar mass distribution Physical and Theoretical Chemistry 0210 nano-technology medicine.drug |
| Zdroj: | Macromolecular Chemistry and Physics. 218:1700077 |
| ISSN: | 1022-1352 |
| Popis: | Polycaprolactones are obtained via ring opening polymerization of e-caprolactone in catalyst-free condition. The polymerization is initiated in bulk, using isosorbide-based amino-alcohol as a biosourced initiator. The ratio of initiator to e-caprolactone, as well as to temperature, is optimized in order to tune the hydroxyl number (Nr. OH) and the average molecular weight of the polymers. In addition, these biocompatible polyesters are used as soft-block to prepare thermoplastic poly(esterurethane)s elastomers via a simple one-pot catalyst-free polymerization. The successful synthesis of poly(esterurethane)s is confirmed by Fourier transform-infrared spectroscopy, and the thermal properties are studied by differential scanning calorimetry. These novel materials exhibit glass transition temperatures ranging from 7 to 38 °C. The biodegradability of these elastomers is evaluated by enzymatic degradation tests performed at rt in phosphate buffer solution (pH ≈ 7.4). The mass loss of polymer films is around 3% after 4 weeks. Scan electron as well as atomic force microscopies are used to show the degradation patterns. |
| Databáze: | OpenAIRE |
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