Synthetic and nature-based materials paper
Al-Safy, R, Al-Mahaidi, R & Simon, GP 2014, 'NIR for structural characterization of nanoclay-modified adhesive used in CFRP applications', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. I, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 169-174. ISBN: 9780994152008.
The chemical and mechanical properties of cured adhesives are sensitive to variations in the starting material. Many parameters are responsible for the properties of the final epoxy network. The chemical structure of the epoxy network is one of these parameters affected by reactions during the curing process. In this work, a commercially-available bonding adhesive, MBrace® Saturant, is used for modification with different concentrations, (0,1,2.5 5 and 7.5 wt%),of Nanomer® I.30E using direct mixing method. The bonding adhesive is commonly used thermosetting polymer for bonding CFRP to concrete members. Characterization of the structure of the adhesive with and without modification was investigated by Near-Infrared spectroscopy (NIR). The results provide qualitative information about the structure of the epoxy network, with and without modification with nanoclay, and enable understanding of the nature and extent of the chemical reactions during the curing process in the presence of nanoclay. No influence was found of nanoclay on the cure reactions and spectrometric changes of cure reactions could be better observed by NIR.