Ring-opening polymerization of ε-caprolactone and L -lactide from silica nanoparticles surface
| Autor: | Philippe Dumas, Mathieu Joubert, Christelle Delaite, Elodie Bourgeat-Lami |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Silica gel Organic Chemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ring-opening polymerization Biodegradable polymer 0104 chemical sciences chemistry.chemical_compound Monomer chemistry Polymerization Polycaprolactone Polymer chemistry Materials Chemistry 0210 nano-technology Caprolactone |
| Zdroj: | Journal of Polymer Science Part A: Polymer Chemistry. 42:1976-1984 |
| ISSN: | 0887-624X |
| DOI: | 10.1002/pola.20035 |
| Popis: | Coating of silica nanoparticles by biocompatible and biodegradable polymers of e-caprolactone and L-lactide was performed in situ by ring-opening polymerization of the cyclic monomers with aluminum, yttrium, and tin alkoxides as catalysts. Hydroxyl groups were introduced on the silica surface by grafting of a prehydrolyzed 3-glycidoxypropyl trimethoxysilane to initiate a catalytic polymerization in the presence of metal alkoxides. In this manner, free polymer chains were formed to grafted ones, and the graft density was controlled by the nature of the metal and the alcohol-to-metal ratio. The grafting reaction was extensively characterized by spectroscopic techniques and quantified. Nanocomposites containing up to 96% of polymer were obtained by this technique. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 1976–1984, 2004 |
| Databáze: | OpenAIRE |
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