Fig. 24

The logarithmic relationship between the apparent viscosity at 135 °C and the FTIR aging index for (a) 40–50; (b) 60–70; and (c) 85–100 base binder samples.

The logarithmic relationship between the apparent viscosity at 135 °C and the FTIR aging index for (a) 40–50; (b) 60–70; and (c) 85–100 base binder samples.