With outstanding temperature recovery characteristics and easy operability, it can also be used for stress relaxation measurements or for tests that. To compare with the standard mooney measurement ml1. Rheological analysis of raw elastomers with the multispeed mooney. The working principle of the mooney viscometer consists in the measurement of the. The mk iii mooney viscometer formally negretti measures and records the viscosity of natural, synthetic or compounded rubber. Mooney viscometer, view mooney viscometer, rade product. It is the latest, lowcost version incorporating a 16 bit microcomputer and latest technology with improved accuracy, enhanced operability and easy calibration control. It is a measure of the viscosity of a rubber or compound determined in a mooney shearing disk viscometer. Rubber, unvulcanized determinations using a shearing. Mooney viscosity is defined as the shearing torque resisting rotation of a cylindrical metal disk or rotor embedded in rubber within a.
At mooney stress relaxation test the mooney viscometer. Mvc3 mooney viscometer is used for measuring viscosity and relaxation of base rubber, raw rubber stock or rubber mass prevulcanization properties, it is also used for measuring viscosity in mooney value for compounded or uncompounded unvulcanized natural, synthetic or regenerated rubber. Pdf viscosity, relaxation and stability of natural. Modelling of mooney viscosity relaxation in natural rubber. Besides only static testing, montech variable mooney viscometers such as the vmv 3000 offer full. Mv 3000 basic static testing entry model instrument for repetitive mooney viscosity, mooney scorch and stress. Smv301smv301rt mooney viscometers feature a color lcd touch panel display that allows the instrum. Data obtained for our unaged and oven aged samples by used mooney viscometer and evaluated by its software are presented in table 1 and in figs. Mooney viscosity and mooney relaxation of unaged and oven aged smr l. Test description a mooney viscometer consists of a rotor cylindrical metal disc embedded in a rubber sample inside a. Purchase your copy of astm d1646 19a as a pdf download or hard copy directly from the official bsi shop. Mooney viscosity is defined as the shearing torque resisting rotation of a. Since the mooney values obtained at very low rotor speed mooney viscometer is used to measure the mooney viscosity of raw rubber or rubber compound.
The dimensions of the shearing disk viscometer, test temperatures, and procedures for determining mooney viscosity are defined in these test methods. It is worth noting that mooney viscometers impose a shear rate of approximately 1 s1, while typical shear rates in injection molding operations are in the neighborhood of s1. The test chamber is filled with the sample and the rotor is rotated with the sample heated to a given constant temperature. The smv301 301rt allows the user to measure the mooney viscosity, scorch time, minimum mooney viscosity, and other characteristics of rubber in accordance with jis, iso, and astm test methods. The mooney viscometer machine is an instrument used for measuring the mooney viscosity of. A mooney viscometer consists of a rotor cylindrical metal disc embedded in a rubber sample inside a sealed cavity.
A mooney viscometer is an instrument used for measuring the mooney viscosity of rubbers. Test description a mooney viscometer consists of a rotor cylindrical. Abstract mooneys shearing disk viscometer is one of the most important analytical research and process control instruments for elastomers. The mv one mooney viscometer is compatible with rotors of both large 38. Because the surface of smv301rt rotors is treated to prevent sticking to samples, while also maintaining adequate rotor hardness, samples are much easier to peel off of the rotor after tests. This system can be used to rapidly cool the viscometer from a higher testing temperature e.
These test methods include procedures for measuring the initial rate of rubber vulcanization. Standard test methods for rubber propertyprocessability. The mooney viscometer machine is an instrument used for measuring the mooney viscosity of a substance mainly elastomers and rubbers. Hz7001b mooney viscometer viscosity for rubber vulcanization index determination. Jan 18, 2020 historical version s view previous versions of standard. These updates, along with the new user interface, keep the premier mv at the forefront of viscometers on the market. Prevulcanization, mooney viscosity and relaxation in one machine.
The dimensions of the shearing disk viscometer, test temperatures, and procedures the methods and procedures to be used for measuring the initial rate of rubber vulcanization. The test sample is placed below and above the rotor with optional test film. An example of mooney viscosity and mooney relaxation curve, i. Mooney viscometer is a precision laboratory test instrument of rubber industries. This information is available to download in pdf format here. The mv one mooney viscometer combines the latest measurement. This option stores specimen details along with graphs and result analysis. The details of stock specimen, which needs to tested are stored in this option. Mooney viscometer with an allnew compact design, the premier mv features multizone stress relaxation data analysis. All mooney viscometer tests can be conducted using this option. Test results of mooney viscosity and scorch 1 butyl type rubber fig. Astm d1646, revision 19a, november 1, 2019 standard test methods for rubberviscosity, stress relaxation, and prevulcanization characteristics mooney viscometer these test methods cover procedures for measuring a property called mooney viscosity. Mooney viscosity curve, mooney s1646 curve, temperature curve of the upper and lower mold 4. Shimadzu analytical and measuring instruments pdf 59.
The mooney viscometer mv 3000 is the leading test instrument for measurement of viscosity, scorching and stress relaxation on polymers and rubber compounds. Sep 05, 2018 mooney viscosity and stress relaxation. Astm d1646 17 standard test methods for rubberviscosity. Table 1 all decrease with increasing time of oven aging at 140. The mooney viscosity was determined by using a monsanto automatic mooney viscometer mv 2000. Mooney viscosity testing at 100c, significantly reducing operator waiting and nonproductive times of the instrument. The rate of relaxation can be used to deduce important properties of rubber, including elastic and viscous behaviour, and rubber structure characteristics. Pc interface rs 232 for 2 way communication to pc mooney v34 software available as extra mooney viscometer printer model, v33 same specification as v32 plus. Since the mooney values obtained at very low rotor speed mooney viscometers made for testing properties such as mooney viscosity, scorch time, and stressrelaxation of rubber samples. Compact printer with high speed print capability 24 character column print output date and time recorder. Mooney viscometer pc model v34 same specification as v32 plus. This standard is issued under the fixed designation d.
Determination of mooney viscosity 1 scope this part of iso 289 specifies a method of use of a shearingdisc viscometer for measuring the mooney viscosity of uncompounded or compounded rubbers. This information, combined with the chart above, should raise a red flag to anyone using a mooney viscometer as a check for injection molding operations. The shimadzu automatic mooney viscometer is an excellent machine for the efficient performance of mooney viscosity and mooney scorch tests. In the rubber industry, mooney viscosity is a standard for evaluating raw rubber under astmd 1646 and iso 289 4 and has. Mooney viscosimeter montech rubber testing solutions.
It was shown that the mooney viscometer can be used not only for the fundamental test but also for the performance test for processibility of raw rubbers. The rotor rotates at a constant speed of two revolutions per minute. Sample in a certain temperature and pressure, the rotor to a certain degree of rotation torque on the sample to a certain degree of shear stress, measure out the rubber antishear torque. Achieve traditional mooney viscosity, scorch, and stress relaxation values with the most durable mooney viscometer built for laboratories or the production floor. The mooney viscometer measures the effect of temperature and time on the viscosity of rubbers. Pdf viscosity, relaxation and stability of natural rubber. Mooney viscometers are the backbone for testing the viscous flow of raw materials such as polymers and intermediates such as.
Rubber, unvulcanized determinations using a shearingdisc. Revisiting the rheological characterization of nr using a. Table 1 all decrease with increasing time of oven aging at 140c, but differences between values of unaged and 30 min aged smr l sample are evidently too small to be suitable for. Pdf influence of processing technology on mooney viscosity and. Since 1934 when mooney developed the viscometer 1, a great deal of. Mooney viscometer is used for testing reclaimed rubber or gross rubber viscosity, etc. This is required when compounded rubber is placed in the mooney viscometer at a temperature at which vulcanization may occur and the vulcanization reaction produces an. Standard test methods for rubber propertyprocessability of.
Mooney viscometers are the backbone for testing the. Overview the smv301 and smv301rt are mooney viscometers made for testing properties such as mooney viscosity, scorch time, and stressrelaxation of rubber samples. Processibility of rubbers and usefulness of the mooney viscometer. The mooney viscometer is used to measure the mooney viscosity of raw rubber or rubber compound. Mooney viscometer is an instrument used to measuring properties of rubber. Standard test methods for rubberviscosity, stress relaxation. One is the measurement of mooney viscosity, the other is the measurement of stress relaxation characteristics, and the third is determination of the scorch time. Use of rubber process analyzer for characterizing the molecular. The measurement of nr mooney viscosity is governed by international standard iso 289. Measured values the time base recording of mooney viscosity is shown in fig.
Evaluation of mooney viscosity by shimadzu mooney viscometer. The mv one is a fully featured instrument configured for standard viscosity, scorch and stress relaxation linear, logarithmic, iso, mooney stressrelaxation rate testing of rubber compounds under isothermal. Because the surface of smv301rt rotors is treated to prevent sticking to samples, while also maintaining adequate rotor hardness, samples. Viscosity of rubber or compound plays vital role in deciding its. Integrated data analysis with pdf reports, histograms and high. The mv one mooney viscometer incorporates the latest measurement technology for the traditional mooney viscosity, mooney scorch, and stress relaxation measurement in the rubber industry. Mooney viscosity is defined as the shearing torque resisting rotation of a cylindrical metal disk or rotor embedded in rubber within a cylindrical cavity.
A wide variety of mooney viscometer rubber tester options are available to you. Aug 01, 2005 the mooney viscometer is an inexpensive instrument cost and maintenance that is easy to use and, above all, available in the great majority of factories producing natural rubber. Pdf the influence of mixed rubber processing technology on mooney viscosity and burning time was studied. Computer control, data display, automatic calibration. Condon,director circularofthenationalbureauofstandardsc451 factorsaffectingresults obtainedwiththemooney. Both rotors are endorsed by international standards and can be selected for measurement of low or high viscosity rubbers or polymers.
Cure characteristics, tensile properties and swelling. Rubber viscosity, stress relaxation, and prevulcanization. Of course, every montech mooney viscometer offers full mooney scorch and delta mooney testing capabilities featuring a selection of over 3500 datapoints which include initial mooney viscosity, minimum viscosity, scorch times and scorch viscosities. The future foundation mooney viscometer is a shearing disk viscometer, designed for accurate measurement of viscosity, scorch time and cure rates of the elastomers. With an allnew compact design, the premier mv features multizone stress relaxation data analysis. Typical automobile applications of fluororubber components and seals are shown in figure 6.
Mooney viscosity is the most widely used processability criterion in the rubber industry. Astm d1646 19a standard test methods for rubberviscosity. Download brochure request quote the mv 3000, is suitable for quality control testing in the harshest production environments or laboratory settings. Download pdf copy download brochure the mv one mooney viscometer combines the latest measurement technology for the standard mooney viscosity, mooney scorch and stress relaxation measurement in the rubber industry.
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