Viscosity measurements were made with a Brookfield LVF
temperature-controlled rotating cylinder viscometer. The inner aluminum
spindle diameter was 1.175 cm, while the outer aluminum cylinder
diameter was 1.900 cm. Reference silicone fluids (97.2 cP and
975 cP) were used to calibrate the viscometer at 25.0 °C. Viscosity was
measured as a function of temperature based on steady-state values at
5 °C intervals, as the enclosure temperature was decreased from 65 °C
to 30 °C. As the enclosure was not equipped with a cooling mechanism,
the lowest temperature measured was limited by the ambient temperature.
Measurements were made at each temperature decrement, at 6,