Dditive, respectively. The polycarboxylate changes its structure again by means of the formation of perfectly defined compact blocks.Oleandomycin Epigenetics Figure 12. Micrograph in the 0.two polycarboxylate compound (lot VS1): (a) 20 ; (b) 10 (supply: the author).Coatings 2021, 11,16 ofFigure 13. Micrograph with the 0.six polycarboxylate compound (lot VS2): (a) 20 ; (b) 10 (supply: the author).Figure 14. Micrograph of the 1.2 polycarboxylate compound (lot VS3): (a) 20 ; (b) ten (supply: the author).Figures 157 show the micrographs of the mixtures of gypsum with citric acid at dosages of 0.02 , 0.06 , and 0.12 of additive, respectively. For citric acid, we are able to see a structure complete of internal voids, which explains the reduced mechanical resistance. The size of the crystals increases using the setting time, as is usually observed within the micrographs.Figure 15. Micrograph on the 0.02 citric acid compound (lot I1): (a) 20 ; (b) 10 (supply: the author).Coatings 2021, 11,17 ofFigure 16. Micrograph on the 0.06 citric acid compound (lot I2): (a) 20 ; (b) ten (supply: the author).Figure 17. Micrograph of your 0.12 citric acid compound (lot I3): (a) 20 ; (b) ten (supply: the author).It has been established that the additives including 25-Hydroxycholesterol Formula melamine compound. Polycarboxylate compound and citric acid considerably have an effect on the dispersion of microstructure components and porosity, which can radically transform mechanical properties and hygrothermal behavior. 4.two. X-ray Chemical Analysis A general analysis having a Sigma 300 VP scanning micrograph and also a vacuum using the energy-dispersive X-ray method indicated the following chemical compositions, as reflected in the attached figures. For evaluation, the samples had been chromium-coated. We began with all the test reference Y1, namely calcium sulfate sample devoid of additive, with an A/Y ratio of 0.5, i.e., 50 water. Figure 18a shows a micrograph of calcium sulfate with no additive, when Figure 18b shows the chemical composition of your reference gypsum.Coatings 2021, 11,18 ofFigure 18. Evaluation region and composition benefits (supply: the author): (a) micrograph of calcium sulfate devoid of additive; (b) chemical composition on the reference gypsum.In Figure 19, the X-ray spectrum shows the transition of your electrons, with K becoming the type of transition from the highest for the innermost layer. Chromium, as currently stated, is a part of the coating material with the sample and just isn’t a part of the composition.Figure 19. X-ray spectrograph of sample Y1 of calcium sulfate without additives. (supply: the author).In Figure 20a , a micrograph with the mixture of gypsum with modified melamine as well as the percentages in the chemical components as assessed using X-ray spectrography are shown. In Figure 21a , the micrograph in the mixture of gypsum with polycarbonate salts plus the percentages from the chemical components as assessed by X-ray spectrography are shown. In Figure 22a , the micrograph in the mixture of gypsum with polycarboxylate along with the percentages of your chemical components as assessed employing X-ray spectrography are shown. In Figure 23a , the micrograph on the mixture of gypsum with citric acid plus the percentages of your chemical elements as assessed applying X-ray spectrography are shown.Coatings 2021, 11,19 ofFigure 20. Analysis area and results for the melamine compound with calcium sulfate, showing the basic sample location and X-ray spectrograph (source: the author): (a) micrograph of gypsum with melamine; (b) chemical composition; (c) chemical composition of gyps.
