Copolymerization of CO2 and propylene oxide using ZnGA/DMC composite catalyst for high molecular weight poly(propylene carbonate)
| Autor: | Ruihua Cheng, Qing-Yang Meng, Tingting Wang, Jiajia Li, Boping Liu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010405 organic chemistry
Process Chemistry and Technology Inorganic chemistry Thermal decomposition 010402 general chemistry 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Yield (chemistry) Propylene carbonate Copolymer Chemical Engineering (miscellaneous) Propylene oxide Glass transition Selectivity Waste Management and Disposal Nuclear chemistry |
| Zdroj: | Journal of CO2 Utilization. 16:86-96 |
| ISSN: | 2212-9820 |
| DOI: | 10.1016/j.jcou.2016.06.011 |
| Popis: | The high yield and high molecular weight poly(propylene carbonate) (PPC) was synthesized via copolymerization of propylene oxide (PO) and carbon dioxide (CO2) catalyzed over zinc glutarate/double metal cyanide (ZnGA/DMC) composite catalyst. A fine crystalline ZnGA component was prepared using the crosslinked restrain effect of nonionic surfactant. Combined with a small amount of DMC, the ZnGA/DMC (molar ratio = 10:1) composite catalyst system showed an excellent synergistic effect on CO2/PO copolymerization with higher activity, selectivity, and shorter reaction time than those of the traditional ZnGA catalyst. Under the optimized reaction conditions, the molecular weight of PPC was up to 3.8 × 105 g/mol at the highest yield of 508.0 gpolym/gcat, and the selectivity was over 97.7% towards polycarbonates rather than polyether linkages. The alternating copolymer PPC exhibited good thermostability, high glass transition temperature (42.0 °C) and high decomposition temperature (5% weight loss at 253.4 °C). A synergistic mechanism of ZnGA/DMC composite catalyst was speculated. |
| Databáze: | OpenAIRE |
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