ASTM_D_2632_-_15.pdf

Designation:D263215Standard Test Method forRubber PropertyResilience by Vertical Rebound1This standard is issued under the fixed designation D2632;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the determination of impactresilience of solid rubber from measurement of the verticalrebound of a dropped mass.1.2 This test method is not applicable to the testing ofcellular rubbers or coated fabrics.1.3 A standard test method for impact resilience and pen-etration of rubber by a rebound pendulum is described in TestMethod D1054.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.5 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD832 Practice for Rubber Conditioning For Low Tempera-ture TestingD1054 Test Method for Rubber PropertyResilience Usinga Goodyear-Healey Rebound Pendulum(Withdrawn2010)3D1349 Practice for RubberStandard Conditions for Test-ingD1566 Terminology Relating to RubberD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries2.2 Other Documents:4ISO-10012-1 Quality Assurance Requirements for Measur-ing EquipmentPart 1:Metrological Confirmation Sys-tem for Measuring Equipment5ANSI/NCSL-Z540-1 American National Standard forCalibrationCalibration Laboratories and Measuring andTest EquipmentGeneral Requirements63.Summary of Test Method3.1 Resilience is determined as the ratio of rebound heightto drop height of a metal plunger of prescribed mass and shapewhich is allowed to fall on the rubber specimen.4.Significance and Use4.1 Resilience is a function of both dynamic modulus andinternal friction of a rubber.It is very sensitive to temperaturechanges and to depth of penetration of the plunger.Consequently,resilience values from one type of reboundinstrument may not,in general,be predicted from results onanother type of rebound instrument.4.2 This test method is used for development and compari-son of materials.It may not directly relate to end-use perfor-mance.5.Apparatus5.1 A diagram of the essential features and dimensions ofthe apparatus appears in Fig.1.It includes means for suspend-ing a plunger at a given height above the specimen,its release,and measuring the subsequent rebound height.1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.10 on Physical Testing.Current edition approved Aug.1,2015.Published January 2016.Originallyapproved in 1967.Last previous edition approved in 2014 as D2632 14.DOI:10.1520/D2632-15.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4This test method previously referenced MIL-STD-4662a Military Standard:Calibration System Requirements,which was subsequently canceled by the Depart-ment of Defense in February 1995.These are the DoD recommended replacementdocuments.5Available from the International Organization for Standardization,1 rue deVaremb,Case postale 56,CH-1211,Geneva 20,Switzerland.6Available from the American National Standards Institute,25 W.43rd St.,4thFloor,New York,NY 10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.1 Each resilience instrument shall have a unique identi-fication number assigned and permanently and visibly im-printed or affixed upon it.5.2 The plunger dimensions are also given in Fig.1.Itsmass shall be 28 6 0.5 g.5.3 The height of the drop point and of the resilience scaleabove the base of the instrument shall be adjustable so that thedrop height is always 400 6 1 mm(16 6 0.04 in.)above thespecimen surface.The resilience scale shall be marked in 100equally spaced divisions.5.3.1 The top of the plunger should be in line with 100 onthe scale when the plunger is locked in the elevated position.Some models of the apparatus d