Ring-opening polymerization of L-lactide by using sodium complexes bearing amide as catalysts in high polar solvent
| Autor: | Cheng Hsun Lee, Yu Lun Chang, Kuo Hui Wu, Chian Hui Lai, Feng Jie Lai, Yi Chun Lai, Shangwu Ding, Hsuan-Ying Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Polymers and Plastics
Dimethyl sulfoxide Sodium Aryl Dispersity chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ring-opening polymerization Pentaerythritol 0104 chemical sciences Solvent chemistry.chemical_compound chemistry Polymerization Polymer chemistry Materials Chemistry 0210 nano-technology |
| Zdroj: | Polymer Bulletin. 78:2813-2827 |
| ISSN: | 1436-2449 0170-0839 |
| Popis: | In this study, a series of sodium complexes with amidate ligands, including sulfonamide, acylamide, and aryl carbamate, were synthesized. These sodium complexes were used as catalysts to study the L-lactide (LA) polymerization in high polar solvent (dimethyl sulfoxide: tetrahydrofuran = 1:4). Among these sodium complexes, CTolOMe-Na (5) exhibited the highest catalytic activity (10 s, conversion > 99% with the ratio [LA]:[CTolOMe-Na (5)]:[BnOH] = 800:1:120, [CTolOMe-Na (5)] = 1.25 mM at 0 °C) and controllability (Đ = 1.10). To prove that CTolOMe-Na (5) can polymerize LA with special initiators in polar solvent, 1,4-benzenedimethanol and pentaerythritol were used as initiators in LA polymerization. The polymerization results revealed that end-chain-modified poly(lactides) with a precise molar mass (MnGPC: 3000–8800) and narrow dispersity (1.04–1.28) can be synthesized. |
| Databáze: | OpenAIRE |
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