ASTM_E_2425_-_11.pdf

Designation:E242511Standard Test Method forLoss Modulus Conformance of Dynamic MechanicalAnalyzers1This standard is issued under the fixed designation E2425;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 performance confirma-tion or measurement of conformance for the loss modulus scaleof a commercial or custom-built dynamic mechanical analyzer(DMA)at 21 C using ultra-high molecular weight polyethyl-ene as a reference material.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 There is no ISO standard equivalent to this test method.1.4 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 to determine theapplicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E473 Terminology Relating to Thermal Analysis and Rhe-ologyE1142 Terminology Relating to Thermophysical PropertiesE1867 Test Method for Temperature Calibration of DynamicMechanical Analyzers3.Terminology3.1 DefinitionsSpecific technical terms used in this testmethod are defined in Terminologies E473 and E1142 includ-ing Celsius,dynamic mechanical analysis and loss modulus.4.Summary of Test Method4.1 The loss modulus signal measured by a dynamic me-chanical analyzer for an elastic material is compared to thereported loss modulus for that reference material.A linearrelationship is used to correlate the experimental loss modulussignal with the reported value of the reference material.4.2 The mode of deformation(for example,tensile,flexure,compression,shear.etc.)shall be reported.5.Significance and Use5.1 This test method demonstrates conformity of a dynamicmechanical analyzer at an isothermal temperature of 21 C.5.2 Dynamic mechanical analysis experiments often uselinear temperature change.This test method does not addressthe effect of that change in temperature on the loss modulus.5.3 This test method may be used in research and develop-ment,specification acceptance,and quality control or assur-ance.6.Apparatus6.1 The essential instrumentation required to provide theminimum dynamic mechanical capability for this test methodincludes:6.1.1 Drive Actuator,to apply force(or displacement)to thespecimen in a periodic manner.This actuator may also becapable of providing static force or displacement to thespecimen.6.1.2 Coupling Shaft,or other means to transmit the forcefrom the motor to the specimen.6.1.3 Clamping System(s),to fix the specimen between thedrive shaft and the stationary clamp(s).6.1.4 Position Sensor,to measure the change in position ofthe specimen during dynamic motion,or6.1.5 Force Sensor,to measure the force developed by thespecimen.6.1.6 Temperature Sensor,to provide an indication of thespecimen temperature to within 61 C.6.1.7 Furnace,to provide controlled heating or cooling of aspecimen at a constant temperature or at a constant rate withinthe applicable temperature range of 100 to+300 C.6.1.8 Temperature Controller,capable of executing a spe-cific temperature program by operating the furnace between100 and+300 C and at a constant temperature within thatrange.1This test method is under the jurisdiction ofASTM Committee E37 on ThermalMeasurements and is the direct responsibility of Subcommittee E37.10 on Funda-mental,Statistical and Mechanical Properties.Current edition approved April 1,2011.Published May 2011.Originallyapproved in 2005.Last previous edition approved in 2005 as E2425 05.DOI:10.1520/E2425-11.2For 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 6.1.9 Data Collection Device,to provide a means of acquir-ing,storing,and displaying measured or calculated signals,orboth.The minimum output signals required for dynamicmechanical analysis are storage modulus,loss modulus,tandelta,temperature,and time.6.2 Auxiliary instrumentation considered necessary in con-ducting this method near or below ambient temperature:6.2.1 Cooling capability to sustain a constant temperature ator below ambient temperature or to provide controlled cooling.6.2.2 Data Analysis capability to provide loss modulusinformation derived from measured signals.7.Reagents and Materials7.1 A reference material of known loss modulus,formed tothe shape suitable for characterization by the particular dy-namic mechanical analyzer(see Table 1).