IR Studies of adhesion promoters. Part 1.—Methoxytrimethylsilane on silica at the solid/liquid interface

Surface-dependent effect of functional silica fillers on photocuring kinetics of hydrogel materials

“…The modification results in significant changes in the intensities of the bands assigned to the silanol groups (Q3, δ = −100 ppm) and siloxane groups (Q4, δ = −110 ppm). The chemisorption of silane and the effectiveness of modification have been confirmed by the detection of the T2 and T3 structures characteristic for the condensation of two and three alkoxyl groups, respectively, of a given amount of silane coupling agent with the silica matrix, particularly well seen for greater amounts of the modifier (T2, δ = −56.8 ppm and T3, δ = −67.1 ppm) …”

“…The chemisorption of silane and the effectiveness of modification have been confirmed by the detection of the T2 and T3 structures characteristic for the condensation of two and three alkoxyl groups, respectively, of a given amount of silane coupling agent with the silica matrix, particularly well seen for greater amounts of the modifier (T2, d 5 256.8 ppm and T3, d 5 267.1 ppm). [50][51][52] Effectiveness of silica modification was also confirmed by 13 C CP MAS NMR spectral analysis. The bands characteristic for the functional groups of MPS (d 5 136.5 ppm, CH 2 5(CH 3 )C; d 5 66.3 ppm, C2O2C; d 5 17.9-29.7 ppm, CH 2 ; d 5 8.0 ppm) have been noted.…”

A Low-Frequency Infrared Study of the Reaction of Methoxymethylsilanes with Silica

“…The infrared spectra (above 1300 cm −1 ) obtained with adsorption of methoxymethylsilanes at room temperature on silica are well documented (11,12). The SiOH band at 3747 cm −1 shifts upon adsorption of the silane giving rise to a broad band centered at about 3350 cm −1 .…”

“…This region becomes more congested when using ethoxymethylsilanes as additional methylene groups reside in this region (14). Further complications also occur because band shapes, intensities, and band frequency depend on surface concentration and on the nature of the adsorbed species (11,18). Nevertheless, the changes occurring in the hydroxyl region and to the OC-H stretching modes provide evidence of the participation of these groups in the reaction on the surface.…”

A study of the influence of solvents on the dispersive characteristics of silica, modified with 3‐aminopropyltriethoxysilane, as filler for plastic and paint systems

“…The chemical modification process of the porous silica adsorbent surface involves selective and non-selective blocking of active functional groups by modifiers of various types (Mittal, 1992;Pires and Rochester, 1995;Plueddemann, 1982).…”