ASTM_E_2716_-_09_2014.pdf

Designation:E271609(Reapproved 2014)Standard Test Method forDetermining Specific Heat Capacity by SinusoidalModulated Temperature Differential Scanning Calorimetry1This standard is issued under the fixed designation E2716;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 describes the determination of specificheat capacity by sinusoidal modulated temperature differentialscanning calorimetry.For the determination of specific heatcapacity by a step-isothermal or multiple step-isothermaltemperature program,the reader is referred to Test MethodE1269.1.2 This test method is generally applicable to thermallystable solids and liquids.1.3 The normal operating range of the test is from 100 to600C.The temperature range may be extended dependingupon the instrumentation and specimen holders used.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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:2E473 Terminology Relating to Thermal Analysis and Rhe-ologyE967 Test Method for Temperature Calibration of Differen-tial Scanning Calorimeters and Differential Thermal Ana-lyzersE968 Practice for Heat Flow Calibration of DifferentialScanning CalorimetersE1142 Terminology Relating to Thermophysical PropertiesE1269 Test Method for Determining Specific Heat Capacityby Differential Scanning Calorimetry3.Terminology3.1 DefinitionsSpecific technical terms found in this testmethod are defined in Terminologies E473 and E1142 includ-ing modulated temperature,isothermal,differential scanningcalorimetry,frequency,heat capacity and specific heat capacity.3.2 Definitions of Terms Specific to This Standard:3.2.1 modulated temperature differential scanning calorim-etry(MTDSC),na version of differential scanning calorim-etry that provides a sinusoidally varying temperature programto the test specimen in addition to the traditional temperatureramp program.3.2.2 quasi-isothermal modulated temperature differentialscanning calorimetry,na variation of modulated temperaturedifferential scanning calorimetry in which a sinusoidally vary-ing temperature program is applied to a test specimen aroundan underlying isothermal temperature4.Summary of Test Method4.1 The specific heat capacity of a test specimen may bedetermined using the modulated temperature approach inwhich an oscillatory or periodically repeating temperatureprogram is imposed upon a test specimen producing anoscillatory(periodic)heat flow into or out of the specimen.4.1.1 Test MethodAconsists of heating the test specimen ina controlled atmosphere through the temperature region ofinterest,using temperature modulation conditions that areappropriate for the measurement.4.1.2 Test Method B consists of equilibrating and holdingthe test specimen at an isothermal temperature in a controlledatmosphere and then applying appropriate temperature modu-lation conditions for the measurement.This procedure can berepeated using as many isothermal temperature holds as aredesired.4.2 The accuracy of the heat capacity thus obtained dependsupon the experimental conditions.For example,when a thintest specimen encapsulated in a specimen pan of high thermalconductivity is treated with temperature oscillations of longperiod(low frequency),the test specimen achieves a uniform1This test method is under the jurisdiction ofASTM Committee E37 on ThermalMeasurements and is the direct responsibility of Subcommittee E37.01 on Calo-rimetry and Mass Loss.Current edition approved March 15,2014.Published April 2014.Originallyapproved in 2009.Last previous edition approved in 2009 as E2716 09.DOI:10.1520/E2716-09R14.2For 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 States1 temperature distribution and the resultant heat capacity infor-mation will be comparable with those of other non-oscillatorytest methods.5.Significance and Use5.1 Modulated temperature differential scanning calorimet-ric measurements provide a rapid,simple method for determin-ing specific heat capacities of materials,even under quasi-isothermal conditions.5.2 Specific heat capacities are important for designpurposes,quality control,and research and development.5.3 The use