VISCOSITY, KINEMATIC OF VOLATILE AND REACTIVE LIQUIDS: D4486
EXPLANATION
Kinematic viscosity is a physical property that is of importance in the design of systems in which flowing liquids are used or handled. This test method is applicable to transparent Newtonian liquids that because of their reactivity, instability, or volatility cannot be used in conventional capillary kinematic viscometers. This test method is applicable up to 2 atm pressure and temperature range from -53 to +135° C.
TEST SUMMARY
The time is measured, in seconds, for a fixed volume of liquid to flow under gravity through the capillary of the viscometer under a reproducible driving head and at a closely controlled temperature. The kinematic viscosity is calculated from the measured flow time and the calibration constant of the viscometer.
TEST PRECISION
The precision and bias of this test method are expected to be substantially identical to that given in Test Method D445 because the functional part of the viscometer used in this test method is identical to the Ubbelohde viscometer specified in Test Method D445.
