The Influence Of Fillers On The Impact Resistance Of The Deck Epoxy Resin Coatings

With the development of Chinese ship industry, the needs of the deck epoxy coating which has excellent impact resistance, strong adhesion, high friction coefficient become increasingly urgent. In particular, the impact resistance could greatly affect the use and the service life of the coating. The fillers, an essential component in the deck epoxy resin, have a significant influence on the performance of the coating. Therefore, the research of the relationship of filler size, shape, content, and their complex on the impact resistance of epoxy resin coating,has a important guiding significance on the development of high-impact deck epoxy coating.In this paper, epoxy coatings with different shapes of the fillers （glass powder, glass flakes and glass fibers） and different sizes of fillers （SiO₂, mica, carbon fibers） were prepared. The relationship between the fillers’ size or shape and the impact performance was investigated.The impact performance of other common fillers was also measured in order to confirm the filler types for complex. In accordance with the complex principle of different sizes and different shapes, the complex fillers/epoxy coatings were prepared and the impact properties were determined, with the purpose of optimal impact performance composite filler formulation. Then the high-impact performance of deck epoxy coating with the obtained formula was tested by daotou impact tester. At the same time the super-molecule polymer was added to the epoxy resin as the new filler, the epoxy resin material included supra-molecular polymer was made. The internal structure of supra-molecular polymer material was characterized by infrared spectroscopy （FT-IR） and scanning electron microscopy （SEM）, and the impact performance of supra-molecular polymer epoxy material was studied by Izod impact tester. The main results were as follows:Different shapes of the SiO₂ filler have the different impact performance on the epoxy resin coatings. At the same filler content, compared with the sheet-like SiO₂ filler and spherical SiO₂ filler, fibrous SiO₂ filler has the more significant effect on the impact resistance of the coating. For adhesion and flexibility, flake filler/epoxy coating and spheral filler/epoxy coating, which can improve the impact resistance of the coating, and fiber filler/epoxy coating has excellent impact resistance and is unrelated with its coating adhesion, flexibility. When the filler content is low （5～20wt.%）, for the different shapes of the filler, with the size of the of the filler decreased, the impact resistance of epoxy resin coating was improved.The impact properties of the epoxy resin coating were studied through the single and complex fillers, and complex filler formula which the impact of the performance is optimal was determined, namely （3% nano TiO2 +15% +10% glass fiber mica AM606）. Add this formulation to the deck epoxy system, the maximum impact height of heavy punch fell down is 1.5 m by the high impact resistance test.Supra-molecular polymer was made, and the micro-holes and irregular morphology of microspheres uniformly distributed in the epoxy resin, and the resin matrix has no chemical reaction with the supra-molecular polymer. With the increase of super-molecular polymer content in epoxy coating, elastic modulus of epoxy coating decreases, and the impact strength increased firstly and then weakened. When supra-molecular polymer content is 2%, the impact strength of composites is 52 kJ/m2, which is two times of the pure epoxy.