607-612Layered double hydroxides (LDHs) based on different
metal cations have been prepared by co-precipitation method and characterized
with X-ray diffraction and Fourier transform infrared spectroscopy. The sample
LDHs have been used as catalysts for transesterification between diphenyl
carbonate (DPC) and 1, 5-pentadiol (1, 5-PD) to poly(1,5-pentadiol) carbonate diols.
The results show that Zn-Al-CO3 LDH and Mg-Al-CO3 LDH are
the most effective catalysts for the transesterification between DPC and
1,5-PD. Taking Zn-Al-CO3 LDH as an example, the effect
of the layered structure of LDHs on the transesterification has been
investigated. The results show that the stability of layered structure is an
important factor that influences the catalytic activity of LDHs