## 3 Results and Discussion
### Test of the Temperature-Resistant Period  
To better evaluate the tackifier's temperature resistance and durability, we investigated its temperature resistance period (defined as one cycle of 16 h), using the same preparation \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & **Age** & **AV** & **PV** & **YP** & **YP/PV** & **Viscosity** \\  & **Condition** & **mPa\(\cdot\)S** & **mPa\(\cdot\)S** & **Pa** & **Pa/mPa\(\cdot\)S** & **Retention** \\  & & & & & & **Rate (\%)** \\ \hline saline water & Before aging & 3.5 & 3 & 0.51 & 0.17 & - \\ Base slurry & 200 \({}^{\circ}\)C & 3 & 3 & 0 & 0 & 85.7 \\ \hline \multirow{4}{*}{Saline-based slurry +3\%DT} & Before aging & 15.5 & 11 & 4.10 & 0.37 & - \\  & 200 \({}^{\circ}\)C & 28 & 26 & 2.04 & 0.08 & 180.7 \\ \cline{1-1}  & 210 \({}^{\circ}\)C & 21 & 14 & 7.15 & 0.51 & 135.5 \\ \cline{1-1}  & 220 \({}^{\circ}\)C & 29 & 26 & 3.07 & 0.12 & 187.1 \\ \cline{1-1}  & 230 \({}^{\circ}\)C & 27 & 22 & 5.11 & 0.23 & 174.2 \\ \cline{1-1}  & 240 \({}^{\circ}\)C & 13.5 & 11 & 2.56 & 0.23 & 87.1 \\ \hline \hline \end{tabular} Note: The saline-based slurry is freshly prepared before each aging. A dash (”-”) indicates that the item is not applicable (the same applies to the following experiments).  
\end{table} 
Table 1: Changes in viscosity of tackifier DT at 200–240 \({}^{\circ}\)C.  
Figure 4: Thermogravimetric analysis of the tackifier. method as previously described. After aging at 200-240 \({}^{\circ}\)C for \(n\) cycles (where \(n\) = 1-4), the viscosity was retested using a six-speed rotary viscometer. The results are presented in Figure 5 and Tables 2-4. The data presented in the chart indicate that, under extreme high-temperature aging conditions, particularly during four cycles (totaling 64 h) at 200 \({}^{\circ}\)C and 210 \({}^{\circ}\)C, the tackifier's viscosity retention rate remains above 62.5%. This clearly demonstrates the \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Age Condition** & **Age Cycle** & **AV mPa**\(\cdot\)**S** & **PV mPa**\(\cdot\)**S** & **YP/Pa** & **YP/PV** & **Viscoity** & **Retention** \\  & & & & & & **Pa**/mPa**\(\cdot\)**S** & **Rate (\%)** \\ \hline room temperature & 0 & 13 & 10 & 3.1 & 0.31 & - \\  & 1 & 18.5 & 10 & 8.7 & 0.87 & 142.3 \\
220 \({}^{\circ}\)C & 2 & 13 & 9 & 4.6 & 0.51 & 100.0 \\  & 3 & 9.5 & 6 & 3.6 & 0.60 & 73.1 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Effect of aging time on the viscosity enhancement performance at 220 \({}^{\circ}\)C.  
Figure 5: Effects of temperature and aging time on (**a**) apparent viscosity, (**b**) plastic viscosity, (**c**) dynamic shear force, and (**d**) changes in the viscosity retention rate. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Age Condition** & **Age Cycle** & **AV mPa**\(\cdot\)**S** & **PV mPa**\(\cdot\)**S** & **YP/Pa** & **YP/PV** & **Viscoity** \\  & & & & & **Pa**/**mPa**\(\cdot\)**S** & **Retention** \\  & & & & & **Rate (\%)** \\ \hline room temperature & 0 & 11.5 & 8 & 3.6 & 0.45 & - \\  & 1 & 21 & 11 & 10.2 & 0.93 & 182.6 \\
230 \({}^{\circ}\)C & 2 & 9 & 6 & 3.1 & 0.51 & 78.3 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Effect of aging time on the viscosity enhancement performance at 230 \({}^{\circ}\)C.  
tackifier's excellent anti-aging characteristics in high-temperature environments. However, in the more extreme range of 220-240 \({}^{\circ}\)C, although the tackifier did not withstand four aging cycles and the viscosity retention rate gradually decreased, it remained above 73.1% during the effective period. Notably, the bubbles generated during high-speed stirring can be eliminated after standing for some time. This may be attributed to the possibility that the tackifier's chains break during high-temperature aging (220-240 \({}^{\circ}\)C), leading to the formation of amphiphilic substances.