Study of the reaction of gamma-methacryloxypropyltrimethoxysilane (gamma-MPS) with slate surfaces

Thermal Analysis (TA) and Fourier Transform Infrared Spectroscopy (FT-IR); were used in order to study the reaction of gamma-methacryloxypropyltrimeth oxysilane (gamma-MPS) with slate surfaces at different temperature conditio ns (25, 35 and 50 degrees C), concentrations (0.5-5% weight of silane) and reaction times (1, 3, 5 and 10 min). By these conditions, a typical physica l adsorption of the gamma-MPS silane on the slate surface has been observed . A monolayer of gamma-MPS is firstly adsorbed on the slate surface by hydr ogen bonding through the carbonyl group of the silane and after that, silan e multilayers are formed where free carbonyl groups are predominant. A conc entration of 1% is considered as appropriate for silanization of the slate particles with gamma-MPS. (C) 1999 Kluwer Academic Publishers.