1、Designation:E164013Standard Test Method forAssignment of the Glass Transition Temperature ByDynamic Mechanical Analysis1This standard is issued under the fixed designation E1640;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the yea
2、r 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 the assignment of a glasstransition temperature(Tg)of materials using dynamic me-chanical anal
3、yzers.1.2 This test method is applicable to thermoplasticpolymers,thermoset polymers,and partially crystalline mate-rials which are thermally stable in the glass transition region.1.3 The applicable range of temperatures for this testmethod is dependent upon the instrumentation used,but,inorder to e
4、ncompass all materials,the minimum temperatureshould be about 150C.1.4 This test method is intended for materials having anelastic modulus in the range of 0.5 MPa to 100 GPa.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6
5、 This standard is similar to IEC 61006 except thatstandard uses the peak temperature of the loss modulus peak asthe glass transition temperature while this standard uses theextrapolated onset temperature of the storage modulus change.1.7 This standard does not purport to address all of thesafety con
6、cerns,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:2D4092 Terminology for Plastics:Dynamic Mec
7、hanicalPropertiesE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1142 Terminology Relating to Thermophysical PropertiesE1363 Test Method for Temperature Calibration of Thermo-mechanical AnalyzersE1545 Test Method for Assignment of the Glass Transition
8、Temperature by Thermomechanical AnalysisE1867 Test Method for Temperature Calibration of DynamicMechanical AnalyzersE2254 Test Method for Storage Modulus Calibration ofDynamic Mechanical AnalyzersE2425 Test Method for Loss Modulus Conformance ofDynamic Mechanical Analyzers2.2 Other Standards:IEC 610
9、06 Methods of Test for the Determination of theGlass Transition Temperature of Electrical Insulating Ma-terials33.Terminology3.1 Definitions:3.1.1 Specific technical terms used in this document aredefined in Terminology D4092 and E1142 including Celsius,dynamic mechanical analyzer,glass transition,g
10、lass transitiontemperature,loss modulus,storage modulus,tangent delta,andviscoelasticity.4.Summary of Test Method4.1 A specimen of known geometry is placed in mechanicaloscillation at either fixed or resonant frequency and changes inthe viscoelastic response of the material are monitored as afunctio
11、n of temperature.Under ideal conditions,duringheating,the glass transition region is marked by a rapiddecrease in the storage modulus and a rapid increase in the lossmodulus and tangent delta.The glass transition of the testspecimen is indicated by the extrapolated onset of the decreasein storage mo
12、dulus which marks the transition from a glassy toa rubbery solid.1This test method is under the jurisdiction ofASTM Committee E37 on ThermalMeasurements and is the direct responsibility of Subcommittee E37.10 onFundamental,Statistical and Mechanical Properties.Current edition approved Aug.1,2013.Pub
13、lished August 2013.Originallyapproved in 1994.Last previous edition approved in 2009 as E1640 09.DOI:10.1520/E1640-13.2For 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
14、 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Significance an
15、d Use5.1 This test method can be used to locate the glasstransition region and assign a glass transition temperature ofamorphous and semi-crystalline materials.5.2 Dynamic mechanical analyzers monitor changes in theviscoelastic properties of a material as a function of tempera-ture and frequency,pro
16、viding a means to quantify thesechanges.In ideal cases,the temperature of the onset of thedecrease in storage modulus marks the glass transition.5.3 A glass transition temperature(Tg)is useful in charac-terizing many important physical attributes of thermoplastic,thermosets,and semi-crystalline materials including their ther-mal history,processing conditions,physical stability,progressof chemical reactions,degree of cure,and both mechanical andelectrical behavior.Tgmay be determined by a variety