Abstract
Raman spectroscopy has been employed in conjunction with 29Si NMR and the molybdenum chemical technique to study the polymerization process of silica sol-gels under pH conditions ranging from 1 to 9. A qualitative correlation between the rate of hydrolysis and the size of the resulting polymeric particles has been tentatively proposed. The extent to which the relative Raman intensity simultaneously proves information regarding particle dimensions, shape and degree of condensation has been discussed. A quantitative comparison between the monomer concentration as determined by the molybdenum chemical technique and by 29Si NMR has been provided.
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