331 • Repeatability and traceability All tests were conducted under controlled laboratory conditions, using calibrated equipment and documented procedures. Independent replicates were performed for each formulation, allowing evaluation of result consistency and ensuring the reliability of the experimental data. 5. RESULTS AND DISCUSSION 5.1. Influence of Temperature on System Preparation Tables 3 to 8 present the temperatures measured for the individual components and the ambient conditions during the preparation of the different systems evaluated: acrylamide, acrylates, and colloidal silica. In all tests performed, the recorded temperatures remained below 32 °C, both for the materials and the ambient temperature. This controlled thermal range is critical, considering that the polymeric systems evaluated gel through free-radical polymerization reactions, which are highly sensitive to temperature. Table 3 – Temperature records of components used in the preparation of the acrylamide-based system Test Design No. Acrylamide-based system Temperature (°C) Base Water TEA Retarder Persulfate Ambient Test 1 1 22.1 23.1 25.1 21.6 22.1 25.4 Test 2 1 22.4 23.2 25.2 21.5 22.3 25.9 Test 3 2 23.0 23.5 25.7 21.6 22.4 28.1 Test 4 2 23.4 23.6 25.4 21.6 22.7 28.1 Table 4 – Temperature records of components used in the preparation of acrylate system A Test Design No. Acrylate system A Temperature (°C) Base Water TEA Retarder Persulfate Ambient Test 1 1 21.8 23.4 25.4 21.0 22.4 27.4 Test 2 1 21.8 23.5 25.6 21.4 22.3 27.6 Test 3 2 22.4 23.4 25.6 21.2 22.2 27.9 Test 4 2 22.1 23.5 25.3 21.4 22.4 28.0 Table 5 – Temperature records of components used in the preparation of acrylate system B Test Design No. Acrylate system B Temperature (°C) Base TEA Persulfate Retarder Water Ambient Test 1 1 23.5 23.1 22.4 23.4 23.3 27.4 Test 2 2 23.7 23.4 22.5 23.5 23.3 28.2 Test 3 3 23.9 23.4 22.4 23.2 23.2 28.5
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