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RARE EARTH COMPLEXES [Ln(EDBP)2(DME)Na(DME)3] AS CATALYSTS FOR THE POLYMERIZATION OF 2,2-DIMETHYLTRIMETHYLENE CARBONATE

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,...

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Bibliographic Details
Published in:Chinese journal of polymer science 2011-05, Vol.29 (3), p.296-299
Main Authors: Xiang, Dong, Yu, Jian-fang, Sun, Wei-lin
Format: Article
Language:English
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Summary: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.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-011-1041-y