Table 7
Determination of the stability and duration of EVA-M and EVA additives on the rheological parameters of Akshabulak oil according to limiting shear stress (yield point) and viscosity depending on time.
| Time (days) |
τ
0 – yield point (Pa) |
η – viscosity (Pa s) |
||
|---|---|---|---|---|
| 5 °C | 0 °C | 5 °C | 0 °C | |
| 1 day | ||||
| EVA-M | 0.1122 | 1.0461 | 0.1107 | 0.2589 |
| EVA | 0.1131 | 1.1128 | 0.1340 | 0.2861 |
| 3 days | ||||
| EVA-M | 0.1042 | 0.4457 | 0.0728 | 0.2060 |
| EVA | 0.1258 | 0.8329 | 0.1089 | 0.3147 |
| 7 days | ||||
| EVA-M | 0.0306 | 0.4790 | 0.1148 | 0.4007 |
| EVA | 0.1416 | 0.8058 | 0.4624 | 0.9143 |
| 14 days | ||||
| EVA-M | 0.0463 | 0.7364 | 0.1425 | 0.5372 |
| EVA | 0.6762 | 1.8226 | 0.4824 | 1.2475 |