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  • ASTM D 1646 : 2003

    NA Status of Standard is Unknown
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    Standard Test Methods for Rubber—Viscosity, Stress Relaxation, and Pre-Vulcanization Characteristics (Mooney Viscometer)

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  10-01-2003

    Publisher:  American Society for Testing and Materials

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    1.1 These test methods describe 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.

    1.2 When disk rotation is abruptly stopped, the torque or stress on the rotor decreases at some rate depending on the rubber being tested and the temperature of the test. This is called 'stress relaxation' and these test methods describe a test method for measuring this relaxation. Viscosity as used in these test methods is not a true viscosity and should be interpreted to mean Mooney viscosity, a measure of shearing torque averaged over a range of shearing rates. Stress relaxation is also a function of the test configuration and for these test methods the results are unique to the Mooney viscometer.

    1.3 When compounded rubber is placed in the Mooney viscometer at a temperature at which vulcanization may occur, the vulcanization reaction produces an increase in torque. These test methods include procedures for measuring the initial rate of rubber vulcanization.

    1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    1.5 ISO Standard 289 Parts 1 and 2 also describes the determination of Mooney viscosity and pre-vulcanization characteristics. In addition to a few insignificant differences there are major technical differences between ISO 289 and this test method in that ISO 289 does not provide for sample preparation on a mill, while this test method allows milling sample preparation in some cases prior to running a Mooney viscosity test. This can result in different viscosity values for some rubbers.

    1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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    Committee D 11
    Document Type Test Method
    Publisher American Society for Testing and Materials
    Status NA
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM D 297 : 2015 Standard Test Methods for Rubber Products—Chemical Analysis
    ASTM D 3186 : 2007 : R2016 Standard Test Methods for Rubber—Evaluation of SBR (Styrene-Butadiene Rubber) Mixed With Carbon Black or Carbon Black and Oil
    ASTM D 3848 : 2003 : R2018 Standard Test Methods for Rubber—Evaluation of NBR (Acrylonitrile-Butadiene Copolymers) Mixed With Carbon Black
    ASTM D 4620 : 2002 : R2017 Standard Test Method for Evaluating the Effective Surface Area of Zinc Oxide in Rubber
    ASTM D 3188 : 2006 : R2017 Standard Test Methods for Rubber—Evaluation of IIR (Isobutene-Isoprene Rubber)
    ASTM D 3190 : 2006 : R2016 Standard Test Method for Rubber—Evaluation of Chloroprene Rubber (CR)
    ASTM D 3403 : 2007 : R2016 Standard Test Methods for Rubber—Evaluation of IR (Isoprene Rubber)
    ASTM D 5900 : 2017 : EDT 1 Standard Specification for Physical and Chemical Properties of Industry Reference Materials (IRM)
    ASTM D 4483 : 2018 Standard Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
    ASTM D 1417 : 2016 Standard Test Methods for Rubber Latices—Synthetic
    ASTM D 3191 : 2010 : R2014 Standard Test Methods for Carbon Black in SBR (Styrene-Butadiene Rubber)—Recipe and Evaluation Procedures
    ASTM D 3568 : 2003 : R2018 Standard Test Methods for Rubber—Evaluation of EPDM (Ethylene Propylene Diene Terpolymers) Including Mixtures With Oil
    ASTM D 3346 : 2017 Standard Test Methods for Rubber Property—Processability of Emulsion SBR (Styrene-Butadiene Rubber) With the Mooney Viscometer (Delta Mooney)
    ASTM D 6048 : 2007 : R2018 Standard Practice for Stress Relaxation Testing of Raw Rubber, Unvulcanized Rubber Compounds, and Thermoplastic Elastomers
    ASTM D 2227 : 1996 : R2015 Standard Specification for Natural Rubber (NR) Technical Grades
    ASTM D 3187 : 2006 : R2016 Standard Test Methods for Rubber—Evaluation of NBR (Acrylonitrile-Butadiene Rubber)
    ASTM D 3484 : 2006 : R2016 Standard Test Methods for Rubber—Evaluation of Oil-Extended Solution BR (Polybutadiene Rubber)
    ASTM D 5605 : 1994 : R2016 Standard Practice for Styrene-Butadiene Rubber (SBR)—Establishing Raw Mooney Viscosity Target Values
    ASTM D 6204 : 2019 Standard Test Method for Rubber—Measurement of Unvulcanized Rheological Properties Using Rotorless Shear Rheometers
    ASTM D 1566 : 2019 Standard Terminology Relating to Rubber
    ASTM D 3958 : 2006 : R2016 Standard Test Methods for Rubber—Evaluation of BIIR and CIIR (Halogenated Isobutene—Isoprene Rubber)
    ASTM D 3185 : 2006 : R2016 Standard Test Methods for Rubber—Evaluation of SBR (Styrene-Butadiene Rubber) Including Mixtures With Oil
    ASTM D 3189 : 2006 : R2016 Standard Test Methods for Rubber—Evaluation of Solution BR (Polybutadiene Rubber)
    ASTM D 3182 : 2016 Standard Practice for Rubber—Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets
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