Issue 19, 2018

Synthesis of polycarbonate diols catalyzed by calcined hydrotalcites doped with the transition metal Ni2+

Abstract

Calcined hydrotalcites doped with Ni2+ (HTC-Ni-T) were prepared and used as catalysts for the synthesis of polycarbonate diols (PCDLs) via transesterification between dimethyl carbonate (DMC) and 1,4-butanediol (BDO). The effects of the content of doped Ni2+ and calcination temperature of HTC-Ni-T on the BDO conversion were investigated. The results showed that the catalytic activity is positively correlated with the content of doped Ni2+ (0.1–0.7 mmol g−1 HT) and calcination temperature (573–773 K), and is determined by the basicity and the structure of the catalyst. HTC-Ni with a Ni2+ doping content of 0.7 mmol g−1 HT calcined at 773 K exhibited the maximum activity. Based on this, the effects of reaction conditions on the conversion of BDO and the yield of PCDLs were studied. Under optimal reaction conditions, the conversion of BDO can reach 80.9% for the transesterification and the yield of PCDLs with an Mw of 1880 can reach 95% for the polycondensation. Moreover, the catalyst was reused four times without a significant loss of the catalytic activity.

Graphical abstract: Synthesis of polycarbonate diols catalyzed by calcined hydrotalcites doped with the transition metal Ni2+

Article information

Article type
Paper
Submitted
16 May 2018
Accepted
27 Aug 2018
First published
28 Aug 2018

New J. Chem., 2018,42, 15997-16004

Synthesis of polycarbonate diols catalyzed by calcined hydrotalcites doped with the transition metal Ni2+

L. Zhu, W. Xue and Z. Zeng, New J. Chem., 2018, 42, 15997 DOI: 10.1039/C8NJ02380H

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