ASTM_D_5289_-_19a.pdf

Designation:D528919aStandard Test Method forRubber PropertyVulcanization Using Rotorless CureMeters1This standard is issued under the fixed designation D5289;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a method for the measurementof selected vulcanization characteristics of rubber compoundsusing unsealed and sealed torsion shear cure meters.The twotypes of instruments may not give the same results.NOTE1An alternative method for the measurement of vulcanizationcharacteristics is given in Test Method D2084.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 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 appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1349 Practice for RubberStandard Conditions for Test-ingD1566 Terminology Relating to RubberD2084 Test Method for Rubber PropertyVulcanizationUsing Oscillating Disk Cure MeterD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 rotorless cure meter,na name for a class of curemeters that uses one of the two specimen shaping members ordies to sense the torque or stress during strain application.Rotorless cure meters do not have a third member in the formof a rotor(see definitions of cure meter in Terminology D1566and Test Method D2084).3.1.2 S torque,nfor an oscillating shear rotorless curemeter,the value measured by a torque transducer at the peakstrain amplitude of the oscillating cycle;represents the elasticresponse of the test material.3.1.3 The following measurements may be taken from therecorded curve of torque as a function of time(see Fig.1):3.1.3.1 minimum S torquemeasure of the elastic stiffnessof the unvulcanized test specimen at the specified vulcanizingtemperature,taken at the lowest point in the vulcanizationcurve.3.1.3.2 maximum,plateau,or highest S torquemeasure ofthe elastic stiffness of the vulcanized test specimen at thespecified vulcanizing temperature,measured within a specifiedperiod of time.3.1.3.3 time to a percentage of full curemeasure of curebased on the time to develop some percentage of the differencein S torque from the minimum to the maximum.3.1.3.4 time to incipient cure(scorch time)measure of thetime at which a specified small increase in S torque hasoccurred;it indicates the beginning of vulcanization.3.1.4 S”torque,nfor an oscillating shear rotorless curemeter,the value measured by a torque transducer at zero strainamplitude of the oscillating cycle;represents the viscousresponse of the test material(see Fig.2).3.1.5 S*torque,nfor an oscillating shear rotorless curemeter,the maximum value measured by a torque transducerduring the oscillating cycle(see Fig.2).3.1.6 The relationship between S*,S,and S”for anyoscillating cycle is:S*5=S!21S”!2(1)1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand Rubber-like Materials and is the direct responsibility of Subcommittee D11.12on Processability Tests.Current edition approved Nov.1,2019.Published November 2019.Originallyapproved in 1992.Last previous edition approved in 2019 as D5289 19.DOI:10.1520/D5289-19A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis 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 Technical Barriers to Trade(TBT)Committee.1 3.1.7 phase angle,nfor an oscillating shear cure meter,the angle of shift between the sinusoidal strain and thesinusoidal S*torque during the oscillating cycle(see Fig.2).3.1.8 Tan,nfor an oscillating shear rotorless cure meter,the tangent of the phase angle.3.1.8.1 DiscussionThe