Currently, silanes are being increasingly used in many applications as substitutes for toxic coatings due to the combination of properties displayed for a lot of them on all kind of materials, increasing adhesion and corrosion strength from environmental friendly solutions. Several researches inform about ?-methacryloxypropyltrimethoxysilano (MPS) provides a good performance as adhesion promoter on metallic, polymeric and ceramic adhesive joints. Moreover, this good behaviour is decreased under wet conditions. This loss of properties can be avoided increasing the crosslinking degree of silane coating. It is necessary to promote hydrolysis process of silane solution to get good coating. The optimal hydrolysis conditions will depend on different factors, such as type of silane and pH. Therefore, studying the hydrolysis process of silane solution is a critical parameter in order to understand the behaviour of silane coatings. So, in this work was studied the hydrolysis and condensation process of MPS at 1% in aqueous solution for pH 4 by Fourier transform infrared spectroscopy (FTIR) and H1 NMR Spectroscopy. The hydrolysis process of previous MPS solution after adding tetraethoxysilane (TEOS) has also been studied. The results showed hydrolysis and condensation reactions are more important when both silanes are in the solution. It provides higher shear strength under aging conditions.
1st International Conference on New Trends in Chemistry, Dubái (Emiratos Árabes Unidos). 24 marzo 2015
Fecha de publicación: marzo 2015.
M. Pantoja, M.A. Martínez, J. Abenojar, Y. Ballesteros, Addition of crosslinking agent into conventional silane solution: effect on hydrolysis and condensation process, 1st International Conference on New Trends in Chemistry - ICNTC 2015, Dubái, Emiratos Árabes Unidos, 24-28 Marzo 2015.