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A series of trimethylene carbonate/l-lactide copolymers with varied comonomers composition were synthesized in bulk, using zinc (II) acetylacetonate and ethyl zinc (II) ethoxide as initiators. The values of the reactivity ratios were determined and they were respectively: rLA=5.06 and rTMC=0.89 in case of zinc (II) acetylacetonate and rLA=13.3 and rTMC=0.33 in case of ethyl zinc (II) ethoxide. Observed...
The paper presents the mechanism of lactide polymerization initiated with zinc (II) acetylacetonate monohydrate. However, the actual initiator of this reaction is the complex containing a metal–oxygen bond, formed by the exchange reaction of acetylacetonate ligand with deprotonated lactide derivative. The described reaction results in the release of free acetylacetonate and formation of transitional...
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