Journal
CHINESE JOURNAL OF POLYMER SCIENCE
Volume 38, Issue 10, Pages 1124-1130Publisher
SPRINGER
DOI: 10.1007/s10118-020-2451-5
Keywords
Salen-cobalt; Epoxides; Carbon dioxide; Copolymerization
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Funding
- National Key Research and Development Program of China [2016YFC1100701]
- National Natural Science Foundation of China [21574124, 51503203, 51773200]
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A series of Salen-Co(II) complexes were synthesized to study the effect of O(2)on the catalytic performance of Salen-Co complexes for the copolymerization of PO/CO2. The Salen-Co(II) complexes showed low activity on the cyclo-addition of CO(2)to PO with the aid of a cocatalyst such as PPNCl. Unexpectedly, with the addition of O-2, the activity of Salen-Co(II) complexes was obviously increased and 100% cyclic carbonate was obtained. As the pressure of O(2)increased, the activity of the complex also increased. With the existence of O-2, the activity of the complexes was influenced by their structures and the pressure of O-2, and the complexes with the conjugated structure showed higher activity. The structures of cocatalyst also played a crucial role as for the change of the activity. By altering the electrophilicity of Salen-Co(III), O(2)can also be used as cocatalyst for the copolymerization of PO/CO2.
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