Mooney Viscosity Testing Machine – GenMooney

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Mooney Viscosity Testing Machine - GenMooney

Standards

ASTM D1646, ISO 289

GenMooney is a Mooney iscosity testing machine is applied to measure the viscosity of the unmixed or mixed unvulcanized natural rubber, synthetic rubber and regenerated rubber. This tester has many functions such as fast warming, maintaining temperature, data stability, etc. It is equipped with an automated calibration feature for a simple data calibration of each experiment.

Features

  • Integrated multiple functions: early vulcanization, Mooney viscosity and stress relaxation can be tested in the same machine.
  • Accurate temperature measurement and control: strict inspection of temperature calibration process.
  • Flexible and accurate torque measurement: includes pressure reduction gear box, high precision sensor and a data acquisition system.
  • High data reproducibility and stable electrical properties of the complete machine
  • Intelligent software providing the strong data inquiry function, and humidity design, with a user friendly interface
  • The test model has the graphs for upper die temperature and lower die temperature viscosity.

Data and Test Results

  • Minimum Mooney value within 30s before the finish
  • Mooney viscosity value after the MY - (viscosity) time is expired.
  • TR80-Required time when the stress relaxation is 80%
  • MY-T - Mooney value of the corresponding time
  • LM-Min 11m to torque value of minimum Mooney viscosity value in scorch test
  • Ml - initial Mooney viscosity
  • Me - Mooney viscosity value
  • MRe - Mooney stress relaxation test

Specifications

Temperature range Room Temperature to 200°C
Temperature accuracy ±0.°C
Temperature display resolution 0.1 "C
Rotor frequency 2 ± 0.02rpm
Mooney viscosity range 0 to 200 Mooney
Torque unit kg-em , 1b-in, N-m Mooney
Test time setting freely when modified in the middle
Control By computer
Air pressure 65psi ( 4.6bar) Not including air compressor
Specimen dimension 5cm
Display NextGen-Software e
Dimension (W x D x H) 31 x 56 x 62cm
Weight 350kg
Power 110V/60Hz or 220V/50Hz
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FAQs

Parts 1 and 2 describe the determination of Mooney Viscosity and the pre-vulcanization characteristics. The main difference from the ISO to the ASTM standard is that ISO 289 does not provide for sample preparation on a mill - while the ASTM method allows milling to prepare the sample for Mooney viscosity testing. Different rubbers may be affected by the use of milling in which cause the results will differ.

Yes, the ASTM standard defines a method for measuring the initial rate of vulcanization. When compounded rubber is tested at a temperature where vulcanization may occur, the reaction produces an increase in torque which can then be measured with the instrument.

When the rotor stops abruptly, the torque or stress on the rotor decreases at a rate which is then measured. The stress relaxation depends on the rubber sample type and the temperature of the test.

The GenMooney Mooney Viscometer follows both the ASTM D1646 standard as well as the ISO 289 industry standard.

It is defined as the shearing torque resisting rotation of a cylindrical metal disc (or rotor) embedded in a rubber sample with a cylindrical cavity.

Absolutely! It can be detected with an increase in viscosity. Because of this, the testing procedure can be used to measure incipient cure (Scorch) time and the rate of cure during the beginning stages of vulcanization.

Stress relaxation is both an elastic and viscous response. Viscosity and stress relaxation do not depend on molecular weight. A slow rate indicates a higher elastic component in the overall sample while a rapid rate indicates a higher viscous component. The rate of stress relaxation correlates with the rubber structure data points such as molecular weight distribution, chain brancing and gel content.

Viscosity values determined by the Mooney Viscometer depend only on molecular structure, molecular weight, and non-rubber constituents that are present in the rubber sample. Seeing as rubber behaves as a non-Newtonian fluid, there is no direct relationship between molecular weight and viscosity.

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