ASTM D 1646 - 15 Standard Test Methods for Rubber - Viscosity, Stress Relaxation, and Pre-Vulcanization Characteristics (Mooney Viscometer)

Current edition approved Dec. 15, 2015. Published January 2016. Originally approved in 1959. Last previous edition approved in 2012 as D1646 – 07 (2012). — 12 p.
These test methods cover procedures for measuring a property called Mooney viscosity. Mooney viscosity is defined as the shearing torque resisting rotation of a cylindrical metal disk (or rotor) embedded in rubber within a cylindrical cavity. The dimensions of the shearing disk viscometer, test temperatures, and procedures for determining Mooney viscosity are defined in these test methods.