Citation: . TARTARIC ACID TEMPLATED SYNTHESIS OF MESOPOROUS Ti-INCORPORATED SILICA AND ITS CATALYTIC ACTIVITY FOR THE RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE*[J]. Chinese Journal of Polymer Science, ;2002, 20(4): 361-368. shu

TARTARIC ACID TEMPLATED SYNTHESIS OF MESOPOROUS Ti-INCORPORATED SILICA AND ITS CATALYTIC ACTIVITY FOR THE RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE*

Received Date: 7 September 2001
Revised Date: 9 November 2001

Ti-incorporated mesoporous silica materials with pore diameters of 3-4 nm have been prepared via the co-hydrolysis and co-condensation reactions, that is the sol-gel reactions, of titanium (IV) tetrabutoxide and tetraethylorthosilicate in the presence of tartaric acid as template, followed by extraction with ethanol to remove the templatemolecules. The materials were characterized in detail by Fourier transform infrared spectroscopy, nitrogen adsorption-desorption test, powder X-ray diffraction,transmission electron microscopy and X-ray energy disperisve spectroscopy.The results indicate that the Ti-containing silica materials have large specific surface areas(ca.1200 m2g-1) and pore volumes (ca/ 0.900 cm3g-1). The mesoporosity arises from disordered interconnecting channels or pores.The Ti-incorporated silicas exhibit catalytic activity for the ring-opening polymerization of ε-caprolactone,otherwise,the pure mesoporous silica material shows on catalytic activity under the identical conditions.
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