Synthesis and Modification of Functional Polycarbonates with Pendant Allyl Groups
| Autor: | Witold Kuran, Tomasz Listoś, Katarzyna Jaszcz, Jan Łukaszczyk |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Allyl glycidyl ether organic chemicals Bioengineering Ether Polymer Isopropyl glycidyl ether Glycidyl ether Catalysis Biomaterials chemistry.chemical_compound Pyrogallol chemistry Polymer chemistry Materials Chemistry Copolymer Organic chemistry Biotechnology |
| Zdroj: | Macromolecular Bioscience. 1:282-289 |
| ISSN: | 1616-5195 1616-5187 |
| DOI: | 10.1002/1616-5195(20011001)1:7<282::aid-mabi282>3.0.co;2-w |
| Popis: | Functional aliphatic polycarbonates with pendant allyl groups were synthesised by copolymerization of carbon dioxide and allyl glycidyl ether (AGE) in the presence of a catalyst system based on ZnEt2 and pyrogallol at a molar ratio 2 : 1. The functionality of some polycarbonates was reduced by replacing a part of allyl ether with saturated glycidyl ether, i.e., butyl glycidyl ether (BGE) or isopropyl glycidyl ether (IGE). Polycarbonates obtained by the copolymerization of AGE and CO2 or by the terpolymerization of AGE, IGE and CO2 were oxidized with m-chloroperbenzoic acid to their respective poly(epoxycarbonate)s. The influence of the AGE/ΣGE ratio in the polycarbonates, the polymer concentration in the reaction solution and the duration of the reaction on the conversion of allyl groups into glycidyl ones was examined. A tendency to gelation of the initial and oxidized polycarbonates during storage was observed. The initial polycarbonates and their oxidized forms were degraded in aqueous buffer of pH = 7.4 at 37°C. The course of hydrolytic degradation was monitored by the determination of mass loss. |
| Databáze: | OpenAIRE |
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