## 3 Results and Discussion
### Investigation of the Mechanism of Sediment Formation in Sediment-Gelling Compositions
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \multicolumn{2}{c}{**SGCs**} & \multicolumn{8}{c}{**Temperature, \({}^{\circ}\)C**} \\ \hline \multicolumn{2}{c}{**Concentration, \%**} & \multicolumn{2}{c}{**30**} & \multicolumn{2}{c}{**40**} & \multicolumn{2}{c}{**60**} & \multicolumn{2}{c}{**80**} \\ \hline \multirow{3}{*}{**PAA**} & \multirow{3}{*}{**NaOH**} & \multicolumn{8}{c}{**Rheological Constants**} \\ \cline{3-10}  & & \(k\) & \(n\) & \(k\) & \(n\) & \(k\) & \(n\) & \(k\) & \(n\) \\ \hline \multirow{6}{*}{0.05} & 0.1 & 0.06 & 0.8284 & 0.036 & 0.8889 & 0.022 & 0.9136 & 0.016 & 0.9255 \\ \cline{2-10}  & 0.12 & 0.037 & 0.8992 & 0.029 & 0.9059 & 0.022 & 0.9180 & 0.015 & 0.9350 \\ \cline{1-1} \cline{2-10}  & 0.15 & 0.037 & 0.8953 & 0.024 & 0.9328 & 0.016 & 0.9645 & 0.009 & 0.9965 \\ \cline{1-1} \cline{2-10}  & 0.25 & 0.03 & 0.9229 & 0.023 & 0.9409 & 0.017 & 0.9559 & 0.006 & 1.0000 \\ \cline{1-1} \cline{2-10}  & 0.75 & 0.024 & 0.9575 & 0.017 & 0.9836 & 0.012 & 0.9849 & 0.008 & 1.0000 \\ \hline \multirow{6}{*}{0.075} & 0.1 & 0.045 & 0.9006 & 0.029 & 0.9202 & 0.025 & 0.9153 & 0.007 & 0.9284 \\ \cline{1-1} \cline{2-10}  & 0.12 & 0.08 & 0.9196 & 0.036 & 0.9116 & 0.026 & 0.9220 & 0.015 & 0.9630 \\ \cline{1-1} \cline{2-10}  & 0.15 & 0.031 & 0.9695 & 0.025 & 0.9712 & 0.018 & 0.9721 & 0.013 & 0.9766 \\ \cline{1-1} \cline{2-10}  & 0.25 & 0.031 & 0.9688 & 0.023 & 0.9802 & 0.015 & 1.0000 & 0.012 & 1.0000 \\ \cline{1-1} \cline{2-10}  & 0.75 & 0.026 & 0.9814 & 0.018 & 1.0000 & 0.014 & 1.0000 & 0.008 & 1.0000 \\ \hline \end{tabular}
\end{table} 
Table 2: Dependence of the nature of the SGC flow on the concentrations of the polymer and alkali and on the temperature. Figure 3 demonstrates plots of rheological constants versus alkali concentration (Figure 3a,b), polymer concentration (Figure 3c), and temperature (Figure 3d,e). Figure 3: Graphs of dependences of rheological constants in the Ostwald–de Waele model on temperature and concentrations of polyacrylamide and alkali: (**a,b**) alkali concentration, (**c,d**) polymer concentration, and (**e,f**) temperature. As can be seen from Table 2, SGCs based on PAA and NaOH during viscometric flow exhibit pseudoplastic properties (\(n<1\)), which weaken with a decrease in polymer concentration, with an increase in alkali concentration from 0.1 to 0.75% in SGCs, and at temperatures from 30 to 80 \({}^{\circ}\)C. For SGCs with 0.05% PAA, 0.25-0.75% alkali at 80 \({}^{\circ}\)C and for SGCs with 0.075% PAA, 0.75% alkali at 40 \({}^{\circ}\)C, 0.25-0.75% alkali at temperatures of 60 and 80 \({}^{\circ}\)C, a transition from pseudoplastic properties to Newtonian ones is observed. In this case, as already noted above, the media, which are characterized by flow curves passing through the origin of coordinates, are called pseudoplastic, and their rheology is described by the power-law model of Ostwald-de Waele. This model (4) is shown above. During statistical analysis, averaged partial dependences of rheological constants on the concentrations of PAA, alkali, and temperature were built, their analytical approximations were found, and generalized dependences \(n\) (or \(k\)) = \(f(C_{PAA},C_{NaOH},t)\) were found using methods known from mathematical statistics. These parameters were determined by methods of mathematical statistics based on the processing of flow curves, as already noted, according to the Ostwald-de Waele power law [9; 13]. The noted particular dependences are presented in graphical form in Figure 4 and Table 3.  
The dependences given in the table above were processed by statistical methods, with an assessment of the closeness of the relationship and adequacy according to the relevant criteria. A comparison of the calculated and experimental values, as well as statistical estimates, shows a fairly good agreement between the calculated and experimental values. In [1,2,11], the rheological characteristics of SGCs based on the L ionomer and alkali were studied.