Unsaturated polyester resin fiberglass due to have good process performance, and low price is epoxy resin, and therefore more and more widely applied in shipbuilding industry, but because of the unsaturated polyester glass fiber reinforced plastic mechanics of unsaturated polyester glass fiber reinforced plastic modified unsaturated polyester resin with good process performance, and low price is epoxy resin, and therefore more and more widely applied in shipbuilding industry, but because of the unsaturated polyester glass fiber reinforced plastic mechanics performance is poorer, limits its further application, so it is necessary to be modified.
Research shows that rigid nanomaterials (SiOx,TiO2, etc.) have different degrees of improvement in strength, toughness, stiffness and heat resistance of unsaturated polyester resin, which is due to the nanomaterials have unique size effect, local field effect, quantum effect and other excellent properties.Nanomaterials have larger specific surface area, less surface defects, more unpaired atoms, higher surface activity, and more opportunities for physical or chemical binding with polymer chains, which improves the adhesion between them and thus increases the strength and toughness of the matrix.Nanoparticles are small, with large specific surface area and concentrated stress, which can induce a large number of small cracks, thus absorbing a large amount of impact energy and improving the impact strength.
Organic rectorite is also used to modify unsaturated polyester. Studies have shown that organic rectorite can form a three-dimensional braided mesh structure with glass fiber and resin, which is helpful to improve the mechanical properties of FRP, especially the interlaminar shear strength.