Sonic Shear Testing
A convenient volume of polymer-containing oil is irradiated
in a sonic oscillator for a period of time and the changes
in viscosity are determined by Test Method D 445. Standard
reference fluids containing either a readily sheared or shear resistant
polymer are run frequently to ensure that the equipment
imparts a controlled amount of sonic energy to the
sample.
Orbahn Shear Testing
A polymer-containing fluid is passed through a diesel
injector nozzle at a shear rate that causes polymer molecules to
degrade. The resultant degradation reduces the kinematic
viscosity of the fluid under test. The percent viscosity loss is a
measure of the mechanical shear stability of the polymer containing
fluid.
Sample Storage Stability
Testing to monitor fuel, component, and lubricant solubility, compatibility, and clarity. Visual method.