Glass fibre reinforced polymer composites are widely used for industrial and engineering applications which include construction, aerospace, automotive and wind energy industry. During the manufacturing glass fibres, they are surface-treated with an aqueous solution. This process and the treated surfaces are called sizing. The sizing influences the properties of the interface between fibres and a matrix, and subsequently affects mechanical properties of composites. In this work the sizing of commercially available glass fibres was analysed so as to study the composition and chemical structures. Soxhlet extraction was used to extract components of the sizing from the glass fibres. The glass fibres, their extracts and coated glass plates were analysed by Thermo-Gravimetric Analysis combined with a mass spectrometer (TGA-MS), and Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectroscopy. Commercially available silane coupling agents were also analysed by ATR-FTIR in order to identify components in the sizing. The results indicate that the analysed fibres have both bonded and physisorbed sizing, containing a film former and a coupling agent.
Proceedings of the 28th International Conference on Surface Modification Technologies, 2014
28th International Conference on Surface Modification Technologies, 2014