期刊
CHEMSUSCHEM
卷 9, 期 16, 页码 2269-2272出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600778
关键词
aminolysis; catalysis; polyurethanes; pk(a); reactivity
资金
- Association Nationale de la Recherche et de la Technologie (ANRT)
- Juxta
- Alexander-von-Humboldt Foundation
The aminolysis of (poly)carbonates by (poly)amines provides access to non-isocyanate polyurethanes (NIPUs) that are toxic-reagent-free analogues of polyurethanes (PUs). Owing to their low reactivity, the ring opening of cyclic carbonates requires the use of a catalyst. Herein, we report that the more available and cheaper ureas could advantageously be used for catalyzing the formation of NIPUs at the expense of the thiourea analogues. In addition, we demonstrate a medium-range pK(a) of the (thio)urea and an unqeual substitution pattern is critical for controlling the efficiency of the carbonate opening.
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