Role of silanes in adhesion-Part I. Dynamic mechanical properties of silane coatings on glass fibers

Abstract The dynamic mechanical properties of glass fibers impregnated with y-methacryloxypropyltrimethoxy silane and methyltrimethoxy silane were studied as a function of the concentration of the silanes in the coating solution. An increase of the concentration of the silanes increases the molecular weight of the polymeric coatings, as well as the extent of their crosslinking, glass transition, modulus, and damping. The dynamic mechanical properties of y-methacryloxypropyltriethoxy silane show a correlation with the adsorption characteristics of the silane on an inorganic filler. It is demonstrated that dynamic mechanical measurements of the glass/silane composites, when combined with other instrumental approaches such as infrared spectroscopy and gel permeation chromatography, may provide valuable information on the composition, the structure, and the mechanical properties of silane coatings on a glass surface. Keywords: Adhesioncoatingscompositescoupling agentsdynamic mechanical propertiesglass fiber-reinforced plasticssilanes