These test methods cover procedures for measuring aproperty called Mooney viscosity. Mooney viscosity is definedas the shearing torque resisting rotation of a cylindrical metaldisk (or rotor) embedded in rubber within a cylindrical cavity.The dimensions of the shearing disk viscometer, testtemperatures, and procedures for determining Mooney viscosity are defined in these test methods.1.2 When disk rotation is abruptly stopped, the torque orstress on the rotor decreases at some rate depending on therubber being tested and the temperature of the test. This iscalled “stress relaxation” and these test methods describe a testmethod for measuring this relaxation.NOTE 1—Viscosity as used in these test methods is not a true viscosityand should be interpreted to mean Mooney viscosity, a measure ofshearing torque averaged over a range of shearing rates. Stress relaxationis also a function of the test configuration and for these test methods theresults are unique to the Mooney viscometer.1.3 When compounded rubber is placed in the Mooneyviscometer at a temperature at which vulcanization may occur,the vulcanization reaction produces an increase in torque.These test methods include procedures for measuring the initialrate of rubber vulcanization.1.4 ISO 289 Parts 1 and 2 also describes the determinationof Mooney viscosity and pre-vulcanization characteristics. Inaddition to a few insignificant differences there are majortechnical differences between ISO 289 and this test method inthat ISO 289 does not provide for sample preparation on a mill,while this test method allows milling sample preparation insome cases prior to running a Mooney viscosity test. This canresult in different viscosity values for some rubbers.1.5 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.
These test methods cover procedures for measuring a<br>property called Mooney viscosity. Mooney viscosity is defined<br>as the shearing torque resisting rotation of a cylindrical metal<br>disk (or rotor) embedded in rubber within a cylindrical cavity.<br>The dimensions of the shearing disk viscometer, test<br>temperatures, and procedures for determining Mooney viscosity are defined in these test methods.<br>1.2 When disk rotation is abruptly stopped, the torque or<br>stress on the rotor decreases at some rate depending on the<br>rubber being tested and the temperature of the test. This is<br>called “stress relaxation” and these test methods describe a test<br>method for measuring this relaxation.<br>NOTE 1—Viscosity as used in these test methods is not a true viscosity<br>and should be interpreted to mean Mooney viscosity, a measure of<br>shearing torque averaged over a range of shearing rates. Stress relaxation<br>is also a function of the test configuration and for these test methods the<br>results are unique to the Mooney viscometer.<br>1.3 When compounded rubber is placed in the Mooney<br>viscometer at a temperature at which vulcanization may occur,<br>the vulcanization reaction produces an increase in torque.<br>These test methods include procedures for measuring the initial<br>rate of rubber vulcanization.<br>1.4 ISO 289 Parts 1 and 2 also describes the determination<br>of Mooney viscosity and pre-vulcanization characteristics. In<br>addition to a few insignificant differences there are major<br>technical differences between ISO 289 and this test method in<br>that ISO 289 does not provide for sample preparation on a mill,<br>while this test method allows milling sample preparation in<br>some cases prior to running a Mooney viscosity test. This can<br>result in different viscosity values for some rubbers.<br>1.5 The values stated in SI units are to be regarded as the<br>standard. The values given in parentheses are for information<br>only.<br>1.6 This standard does not purport to address all of the<br>safety concerns, if any, associated with its use. It is the<br>responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.<br>1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the<br>Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical<br>Barriers to Trade (TBT) Committee.
正在翻译中..