期刊
APPLIED CATALYSIS A-GENERAL
卷 464, 期 -, 页码 51-60出版社
ELSEVIER
DOI: 10.1016/j.apcata.2013.05.024
关键词
Double-metal cyanide; Hydrophobic solid acid catalyst; Heterogeneous catalysis; Dendrimers; Hyperbranched polymers
资金
- Council of Scientific and Industrial Research, New Delhi
Catalytic activity of a series of Fe-Zn double-metal cyanide (DMC) complexes with varying structural and acidic properties has been investigated for the synthesis of hyperbranched polyesters (HPs) from glycerol and succinic acid/adipic acid. The DMC complexes were prepared using different complexing and co-complexing agents. Hydrophobicity of the surface, Lewis acidity and micro-mesoporous architecture are the critical features of DMC enabled control on gelation process in preparing HPs of high degree of branching. The micro-mesoporous architecture of DMC acts as a nano-reactor for reactant molecules to form primary condensation products which further polymerize yielding dendrimers. Hyperbranched polyesters of degree of branching as high as 90% could be achieved without gelation using DMC catalysts. (C) 2013 Elsevier B.V. All rights reserved.
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