THE INFLUENCE OF ALKALINE MEDIUM ON FINISHED PRODUCTS MADE OF PURE PHOTOPOLYMER RESINS AND RESINS FILLED WITH GRAPHITE

10.25712/ASTU.1811-1416.2025.02.008

Abstract

The research is aimed at developing new composite materials based on photopolymer resins modified with microdispersed graphite filler in order to increase chemical resistance to aggressive alkaline environment. The relevance of the work is due to the need to create chemically resistant photopolymer resins to an alkaline environment for use in mechanical engineering, in particular, in the production of construction 3D printers that print concrete. The results of the creation of a graphite filler for the modification of photopolymer resins of the brands SUNLU ABS-Like (China), HARZ Labs Industrial Nylon-Like (Russia) and HARZ Labs Industrial Rigid (Russia) obtained using a spherical planetary mill are presented. The analysis of the structure of the prepared graphite filler, including X-ray diffraction analysis and scanning electron microscopy, is presented. The processes of creating modified photopolymer resins and evaluating the effect of filler on the chemical resistance of resins to an alkaline medium by contacting samples with an alkaline medium are described. As a result of the study, it was found that the particle sizes of graphite filler ranged from 10 to 40 microns, and an analysis of the structure showed that it was close to the characteristics of hexagonal graphite. In addition, the results of the analysis of samples of photopolymer resins containing 10% graphite by weight of the resin indicate that they demonstrate the greatest resistance to the effects of an alkaline environment compared with pure photopolymer resins.