Citation: Dong Xiang, Jian-fang Yu, Wei-lin Sun. Rare Earth Complexes [Ln(EDBP)2(DME)Na(DME)3] as CATALYSTS for the polymerization of 2,2-Dimethyltrimethylene carbonate[J]. Chinese Journal of Polymer Science, ;2011, 29(3): 296-299. doi: 10.1007/s10118-011-1041-y shu

Rare Earth Complexes [Ln(EDBP)2(DME)Na(DME)3] as CATALYSTS for the polymerization of 2,2-Dimethyltrimethylene carbonate

Received Date: 20 January 2011
Revised Date: 28 January 2011

The biphenol based discrete ion-pair rare earth complexes, [Ln(EDBP)2(DME)Na(DME)3] [Ln = Er(1), Yb(2), Sm(3)], were prepared and used as catalysts for the ring-opening polymerization (ROP) of 2,2-dimethyltrimethylene carbonate (DTC). Three complexes show moderate activities for the polymerization, and the catalytic activities increase in the following sequence: (Yb Er Sm). The effect of different ratios of [DTC]/[Ln], polymerization temperature and time on the polymerization was investigated. Moreover, PDTC without ether unit developed from possible CO2 elimination was prepared. Biphenol; Ring-opening polymerization; 2,2-Dimethyltrimethylene carbonate
- Biphenol,
- Ring-opening polymerization,
- 2,2-Dimethyltrimethylene carbonate
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