.COATINGS WITH A TWO-COMPONENT ADDITIVE FOR TRANSPORT EQUIPMENT
Abstract
Annotation. It is reasonable to use protective polymeric composite coatings to improve the operational characteristics of vehicle parts, including their anti-corrosion properties and wear resistance. It is shown that in order to increase the parameters of physicomechanical and thermophysical properties in epoxy binder it is necessary to introduce additives: modifiers, plasticizers, disperse and fibrous fillers. Actual is the introduction of dispersed additives into the epoxy binder, and it is effective to use fillers of different dispersity in the complex.
The effect of a two-component polydisperse filler on the flexural modulus and toughness of a developed epoxy composite is analyzed. The critical content of a two-component polydisperse filler was established by the method of mathematical experiment planning: iron scale (d = 60...63 μm) - 60 ... 70 parts by weight, Waltrop (d = 8...10 μm) – 10...20 parts by weight by 100 parts by mass. epoxy oligomer ED-20. The introduction of a two-component polydisperse filler into the epoxy binder makes it possible to significantly increase the modulus of elasticity in the bending of protective coatings to E = 5.5...5.8 GPa and the toughness to W = 8.5...8.7 kJ/m2. The results obtained make it possible to create materials with improved parameters of physicomechanical properties.
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