Mooney unit

Mooney unit

[′mün·ē ‚yü·nət]
(chemical engineering)
An arbitrary unit used to measure the plasticity of raw, or unvulcanized rubber; the plasticity in Mooney units is equal to the torque, measured on an arbitrary scale, on a disk in a vessel that contains rubber at a temperature of 100°C and rotates at two revolutions per minute.
References in periodicals archive ?
Figure 3 shows the plot of log Mooney unit from the stress relaxation test of NR for different forms.
In table 3, the time for a 30 Mooney unit rise, t[Delta.
Mooney viscosity (ML) is reported as ML (1+4) at 125[degrees]C in Mooney units, where L designates "large" rotor and the two numbers in parenthesis refer to the pre-heat time and test time according to ASTM D 1646-99.
R]), or viscosity in Mooney units, is defined as the torque required to rotate the rotor at 2 rpm (average shear rate of 1.
Synthetic poly( 1,4-c/s-isoprene) (IR) (Nizhnekamskneftechim Export) had the trade name SKI3 and 70 Mooney units (MU) as Mooney viscosity ([M.
The Mooney viscosity of grade TSR 10 samples varied in the same manner to attain a limiting value after about 16 min, whereas those of the grade TSR 3CV samples decreased to give two distinct trends: the reduction was rapid and continuous throughout mastication for clone PB 217 samples, from an initial value of about 50 to less than 10 Mooney units after prolonged mastication for 20 min.
Nitrile butadiene rubber (NBR) grades with acrylonitrile (ACN) content from 17% to 40% and viscosity from 35 to 120 Mooney units are available.
The high viscosity after the first mixing stage in the E-type kneader revealed a high share of improperly incorporated filler, but after the second mixing stage, the mechanical energy input was sufficient to yield a Mooney viscosity at around 110 Mooney units.
Stress relaxation tests conducted by the unit include relaxation time, percent of viscosity decay, the value of the exponent, the constant, the correlation coefficient and the area of the test, and plot of log Mooney units versus log time.
The bar chart shows the Mooney viscosity can range from a low of about 44 Mooney units to almost three times that value for the high Mooney viscosity value.
Mooney viscosity is actually reported in arbitrary "Mooney" units; however, these Mooney units have become part of the language of rubber.