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Table 4

The structural parameter (β) for TBAB and TBAA at various mass fractions.

Quaternary ammonium salt Mass fraction β/K·MPa−1 Calculation method
TBAB 0.0350 8.1324 Extrapolated using Figure 2
0.0490 6.8749 Extrapolated using Figure 2
0.1500 3.9326 Interpolated using Figure 2
TBAA 0.0990 4.5000 Optimized in this work

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