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By X. S. Zhao, Hongzong Si, Peilong Xu

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2, respectively. With the increase of reaction temperature, the yield of product was increased. 9% when the reaction temperature was as high as 100 oC. So the appropriate reaction temperature was 50 oC which can provide a suitable conversion rate of Si-H. 200 180 %Transmittance 160 140 120 100 80 60 PHMS PIBMS 40 20 0 1000 1500 2000 2500 3000 3500 4000 -1 Wavenumber(cm ) Fig. 3. The absorption peak at 2950 cm-1 was attributed to the symmetric and asymmetric telescopic vibration of the –CH3; the absorption peak located at 2160 cm-1 was assigned to stretching vibration of the Si-H bonds; the absorption peak located at 1280 cm-1 was assigned to deformation vibration of –CH3 of the siloxane components.

Schematic illustration for synthesis of MIPS Characteristic of FT-IR spectra. 74 and 971cm-1 indicated Si-O-Si and Si-O-H stretching vibrations, respectively. The bands around 799 and 470cm-1 resulted from Si-O vibrations . 83cm-1, and it indicated that silanol groups were not silanized completely. 61 cm-1 in the spectrum of KH-570/SiO2 were attributed to the stretching vibration absorption of saturated C–H band and carbonyl C=O in ester groups, respectively. These results suggested that KH-570 had been grafted successfully onto the surface of SiO2 .

The presence of vicinal silanol groups are confirmed by the absorption near 5314 cm-1 and the presence of geminal silanol groups are confirmed by the absorption near 5263 cm-1. The presence of free silanol groups are confirmed by the absorption near 5314 cm-1. H. A. Wickersham, Near infrared Characterization of Water and Hydroxyl Groups on Silica Surfaces, Surf. Sci. 2 (1964) 251-260. D. Low, N. Ramasubramanian, Infrared Study of Nature of Hydroxyl Groups on Surface of Porous Glass, J. Phys. Chem.

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