Rheological and physical-mechanical properties of thermosetting polymer composites with fillers from carbon nanostructures and montmorillonite

Thermosetting polymers are widely used in construction as repair compounds, proStudies aimed at improving the rheological and physico-mechanical properties of composites with an epoxy base when structural and functional fillers are added to its composition are promising.tective and decorative coatings.Rheological and physico-mechanical properties of composite materials containing epoxy resin, carbon nanotubes and montmorillonite Garamite 7305 have been studied. Single-layer twisted nanotubes had a diameter of about 75 nm and a length of 300 nm, and were synthesized in the form of plates by vacuum deposition of atomic carbon on a copper substrate. Epoxy-based compositions with different percentages of nanotubes and montmorillonite were obtained.Rheological and physico-mechanical properties of composite materials containing epoxy resin, carbon nanotubes and montmorillonite Garamite 7305 have been studied. Single-layer twisted nanotubes had a diameter of about 75 nm and a length of 300 nm, and were synthesized in the form of plates by vacuum deposition of atomic carbon on a copper substrate. Epoxy-based compositions with different percentages of nanotubes and montmorillonite were obtained. Single-layer twisted nanotubes had a diameter of about 75 nm and a length of 300 nm, and were synthesized in the form of plates by vacuum deposition of atomic carbon on a copper substrate. Epoxy-based compositions with different percentages of nanotubes and montmorillonite were obtained. Rheological studies of the obtained materials were carried out. The dynamic viscosity of the composite increased with an increase in the percentage of fillers at low shear rates and decreased to almost the same value at a shear rate of 100 1/s. Carbon nanotubes in concentrations of 5 and 10% caused a linear increase in shear stress with increasing shear rate, while the samples exhibited behavior similar to liquid. With the addition of 15% carbon nanotubes, the shear yield strength of 500 Pa was reached; below this limit, the composition demonstrated solid properties under stress. The introduction of 2% montmorillonite into the composition with a 15% carbon nanotube content doubled the yield strength of the material, bringing it to 1000 Pa. Bending tests of the samples obtained by casting showed only a slight decrease in the strength of the composite compared to pure epoxy resin. As a result of the study, optimal compositions of epoxy resin-based composites with functional fillers were obtained, which are convenient to use, including for 3D printing, due to a significant increase in material fluidity when passing through the tool nozzle. Keywords: thermosetting resins, epoxy composite, functional fillers, carbon nanotubes, montmorillonite, composite material.