“…Moreover, it also indicates that the OH groups on the silica network are condensing to form Si-O-Si bridges resulting in the weight loss. It has been previously reported that the weight loss at temperatures lower than 270 °C in composites is due to the removal of physically absorbed water molecules [34][35][36][37]. While, in the case of heat treated sample, the first regime corresponds to removal of solvent residues and adsorbed water.…”