1、Designation:D502615Standard Test Method forPlastics:Dynamic Mechanical Properties:In Tension1This standard is issued under the fixed designation D5026;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method outlines the use of dynamic mechanicalinstrumentation for gathering and reporting the viscoelasticproperties of thermoplastic a
3、nd thermosetting resins and com-posite systems in the form of rectangular specimens moldeddirectly or cut from sheets,plates,or molded shapes.Thetensile data generated may be used to identify the thermome-chanical properties of a plastic material or composition using avariety of dynamic mechanical i
4、nstruments.1.2 This test method is intended to provide a means fordetermining viscoelastic properties of a wide variety of plasticmaterials using nonresonant forced-vibration techniques,inaccordance with Practice D4065.Plots of the elastic(storage)modulus;loss(viscous)modulus;complex modulus and tan
5、delta as a function of frequency,time,or temperature areindicative of significant transitions in the thermomechanicalperformance of the polymeric material system.1.3 This test method is valid for a wide range of frequencies,typically from 0.01 to 100 Hz.1.4 Apparent discrepancies may arise in result
6、s obtainedunder differing experimental conditions.These apparent differ-ences from results observed in another study can usually bereconciled,without changing the observed data,by reporting infull(as described in this test method)the conditions underwhich the data were obtained.1.5 Due to possible i
7、nstrumentation compliance,the datagenerated are intended to indicate relative and not necessarilyabsolute property values.1.6 Test data obtained by this test method are relevant andappropriate for use in engineering design.1.7 The values stated in SI units are to be regarded asstandard.The values gi
8、ven in parentheses are for informationonly.1.8 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
9、limitations prior to use.NOTE1This test method is technically equivalent to ISO 6721,Part 4.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD4000 Classification System for Specifying Plastic Materi-alsD4065 Practice for Plastics:Dynamic Mechanical Proper-
10、ties:Determination and Report of ProceduresD4092 Terminology for Plastics:Dynamic MechanicalPropertiesIEEE/ASTM SI-10 Practice for Use of the InternationalSystem of Units(SI)(the Modernized Metric System)2.2 ISO Standard:3ISO 6721,Part 4 PlasticsDetermination of Dynamic Me-chanical Properties,Part 4
11、:Tensile VibrationNon-Resonance Method3.Terminology3.1 DefinitionsFor definitions applicable to this testmethod refer to Terminology D4092.4.Summary of Test Method4.1 This test method covers the determination of the vis-coelastic properties of a plastic material using dynamic me-chanical techniques
12、in tension.A test specimen of rectangularcross section is tested in dynamic tension.The specimen isgripped longitudinally between two clamps.The specimen isplaced in mechanical linear tensile displacement at fixedfrequencies with a linear temperature variation or variablefrequencies at isothermal co
13、nditions.The elastic moduli or lossmoduli,or both,of the polymeric material system are measuredin tension.NOTE2The particular method for measurement of the elastic and loss1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D2
14、0.10 on Mechanical Properties.Current edition approved July 1,2015.Published July 2015.Originally approvedin 1989.Last previous edition approved in 2014 as D5026-06(2014)1.DOI:10.1520/D5026-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servi
15、ceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of
16、this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 moduli and tan delta depends upon the individual instruments operatingprinciples.5.Significance and Use5.1 This test method provides a simple means of character-izing the thermomechanical behavior of plastic materials usingvery small amounts of material.The data obtained may be usedfor quality control,research and development,as well as theestablishment of optimum processing
