ASTM_E_2070_-_13.pdf

Designation:E207013Standard Test Method forKinetic Parameters by Differential Scanning CalorimetryUsing Isothermal Methods1This standard is issued under the fixed designation E2070;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 Test Methods A,B,and C determine kinetic parametersfor activation energy,pre-exponential factor and reaction orderusing differential scanning calorimetry from a series of isother-mal experiments over a small(10 K)temperature range.TestMethod A is applicable to low nth order reactions.TestMethods B and C are applicable to accelerating reactions suchas thermoset curing or pyrotechnic reactions and crystallizationtransformations in the temperature range from 300 to 900 K(nominally 30 to 630C).This test method is applicable only tothese types of exothermic reactions when the thermal curves donot exhibit shoulders,double peaks,discontinuities or shifts inbaseline.1.2 Test Methods D and E also determines the activationenergy of a set of time-to-event and isothermal temperaturedata generated by this or other procedures1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This test method is similar but not equivalent toISO DIS 11357,Part 5,and provides more information than theISO standard.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.Specific precau-tionary statements are given in Section 8.2.Referenced Documents2.1 ASTM Standards:2D3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsD3895 Test Method for Oxidative-Induction Time of Poly-olefins by Differential Scanning CalorimetryD4565 Test Methods for Physical and Environmental Per-formance Properties of Insulations and Jackets for Tele-communications Wire and CableD5483 Test Method for Oxidation Induction Time of Lubri-cating Greases by Pressure Differential Scanning Calorim-etryD6186 Test Method for Oxidation Induction Time of Lubri-cating Oils by Pressure Differential Scanning Calorimetry(PDSC)E473 Terminology Relating to Thermal Analysis and Rhe-ologyE537 Test Method for The Thermal Stability of Chemicalsby Differential Scanning CalorimetryE698 Test Method for Arrhenius Kinetic Constants forThermally Unstable Materials Using Differential Scan-ning Calorimetry and the Flynn/Wall/Ozawa MethodE967 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 PropertiesE1445 Terminology Relating to Hazard Potential of Chemi-calsE1858 Test Method for Determining Oxidation InductionTime of Hydrocarbons by Differential Scanning Calorim-etryE1860 Test Method for Elapsed Time Calibration of Ther-mal AnalyzersE1970 Practice for Statistical Treatment of ThermoanalyticalData1This 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 Sept.15,2013.Published October 2013.Originallyapproved in 2000.Last previous edition approved in 2008 as E2070 08.DOI:10.1520/E2070-13.2For 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 standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 E2041 Test Method for Estimating Kinetic Parameters byDifferential Scanning Calorimeter Using the Borchardtand Daniels MethodE2046 Test Method for Reaction Induction Time by ThermalAnalysis2.2 ISO Standard:3ISO DIS 11357 Part 5:Determination of Temperature and/orTime of Reaction and Reaction Kinetics3.Terminology3.1 Specific technical terms used in this test method aredefined in Terminologies E473,E1142,and E1445,includingthe terms calorimeter,Celsius,crystallization,differentialscanning calorimetry,general rate law,isothermal,peak,andreaction.4.Summary of Test Method4.1 A test specimen is held at a constant temperature in adifferential scanning calorimeter throughout an exothermicreaction.The rate of heat evolution,developed by the reaction,is proportional to the rate of reaction.Integration of the heatflow as a function of time yields the total heat of reaction.4.2 An accelerating(Sestak-Berggren or Avrami models),nth order data,or model free treatment4,5,6is used