ASTM E2425-05

Standard Test Method for Loss Modulus Conformance of Dynamic Mechanical Analyzers

SCOPE
1.1 This test method describes the performance confirmation or measurement of conformance for the loss modulus scale of a commercial or custom-built dynamic mechanical analyzer (DMA) at 21 C using poly(methylmethacrylate) as a reference material.
1.2 SI units are the standard
1.3 There is no ISO standard equivalent to this test method.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Aug-2005
• ICS: 25.040.40 - Industrial process measurement and control
• Technical Committee: E37 - Thermal Measurements
• Drafting Committee: E37.10 - Fundamental, Statistical and Mechanical Properties

Relations

• Replaced By: ASTM E2425-11 - Standard Test Method for Loss Modulus Conformance of Dynamic Mechanical Analyzers
• Effective Date: 01-Apr-2011
• Referred By: ASTM D4065-20 - Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
• Effective Date: 01-Sep-2005
• Referred By: ASTM E2254-23 - Standard Test Method for Storage Modulus Calibration of Dynamic Mechanical Analyzers
• Effective Date: 01-Sep-2005
• Referred By: ASTM E1640-23 - Standard Test Method for Assignment of the Glass Transition Temperature By Dynamic Mechanical Analysis
• Effective Date: 01-Sep-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E2425–05
Standard Test Method for
Loss Modulus Conformance of Dynamic Mechanical
Analyzers
This standard is issued under the fixed designation E2425; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 The mode of deformation (for example, tensile, flexure,
compression, shear. etc.) shall be reported.
1.1 This test method describes the performance confirma-
tionormeasurementofconformanceforthelossmodulusscale
5. Significance and Use
of a commercial or custom-built dynamic mechanical analyzer
5.1 This test method demonstrates conformity of a dynamic
(DMA)at21°Cusingpoly(methylmethacrylate)asareference
mechanical analyzer at an isothermal temperature of 21 °C.
material.
5.2 Dynamic mechanical analysis experiments often use
1.2 SI units are the standard
linear temperature change. This method does not address the
1.3 There is no ISO standard equivalent to this test method.
effect of that change in temperature on the loss modulus.
1.4 This standard does not purport to address all of the
5.3 This method may be used in research and development,
safety concerns, if any, associated with its use. It is the
specification acceptance, and quality control or assurance.
responsibility of the user of this standard to establish appro-
priate safety and health practices and to determine the
6. Apparatus
applicability of regulatory limitations prior to use.
6.1 The essential instrumentation required to provide the
2. Referenced Documents minimum dynamic mechanical capability for this test method
2 includes:
2.1 ASTM Standards:
6.1.1 Drive Actuator,toapplyforce(ordisplacement)tothe
E473 Terminology Relating to Thermal Analysis and Rhe-
specimen in a periodic manner. This actuator may also be
ology
capable of providing static force or displacement to the
E1142 Terminology Relating to Thermophysical Properties
specimen.
E1867 Test Method for Temperature Calibration of Dy-
6.1.2 Coupling Shaft, or other means to transmit the force
namic Mechanical Analyzers
from the motor to the specimen.
3. Terminology 6.1.3 Clamping System(s), to fix the specimen between the
drive shaft and the stationary clamp(s).
3.1 Definitions: Specific technical terms used in this test
6.1.4 Position Sensor, to measure the change in position of
method are defined in Terminologies E473 and E1142.
the specimen during dynamic motion, or
4. Summary of Test Method 6.1.5 Force Sensor, to measure the force developed by the
specimen.
4.1 The loss modulus signal measured by a dynamic me-
6.1.6 Temperature Sensor, to provide an indication of the
chanical analyzer for an elastic material is compared to the
specimen temperature to within 6 1 °C.
reported loss modulus for that reference material. A linear
6.1.7 Furnace, to provide controlled heating or cooling of a
relationship is used to correlate the experimental loss modulus
specimen at a constant temperature or at a constant rate within
signal with the reported value of the reference material.
the applicable temperature range of -100 to +300 °C.
6.1.8 Temperature Controller, capable of executing a spe-
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
cific temperature program by operating the furnace between
Measurements and is the direct responsibility of Subcommittee E37.10 Fundamen-
-100 and +300 °C and at a constant temperature within that
tal, Statistical and Mechanical Properties.
range.
Current edition approved Sept. 1, 2005. Published October 2005. DOI: 10.1520/
E2425-05.
6.1.9 Recording Device, capable of recording and display-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ing the loss modulus signal as a change in specimen stress
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
(force) or position (displacement) on the Y-axis and tempera-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ture or time on the X-axis.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E2425–05
6.2 Auxiliary instrumentation considered necessary in con- 10.5 Recordthelossmodulusofthereferencematerialfrom
ducting this method near or below ambient temperature: its certificate or from Table 1 as E .
s
6.2.1 Coolingcapabilitytosustainaconstanttemperatureat 10.6 Calculate and report the value of the slope (S) and
orbelowambienttemperatureortoprovidecontrolledcooling. conformity (C) of the measurement using Eq 2 and Eq 3.
6.2.2 Data Analysis capability to provide loss modulus
11. Calculation
information derived from measured signals.
11.1 For the purpose of this test method, it is assumed that
7. Reagents and Materials
the relationship between the observed loss modulus (E ) and
o
7.1 Areference material of known loss modulus, formed to
the reference loss modulus (E ) is linear and governed by the
s
the shape suitable for characterization by the particular dy-
slope (S)ofEq1.
namic mechanical analyzer (see Table 1).
E 5 E 3 S (1)
s o
8. Sampling and Test Specimens 11.2 By using the loss modulus values taken from 10.4 and
10.5, calculate and report S using Eq 2 to four decimal places.
8.1 Test specimens are typically prepared in the form of a
S 5 E / E (2)
re
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