ASTM D5930-16
(Test Method)Standard Test Method for Thermal Conductivity of Plastics by Means of a Transient Line-Source Technique
Standard Test Method for Thermal Conductivity of Plastics by Means of a Transient Line-Source Technique
SIGNIFICANCE AND USE
5.1 The relative simplicity of the test method makes it applicable for a wide range of materials (4, 5). The technique is capable of fast measurements, making it possible to take data before the materials suffer thermal degradation. Alternatively, it is possible to study the effect of compositional changes such as chemical reaction or aging (6). Short measurement times permit generation of large amounts of data with little effort. The line-source probe and the accompanying test specimen are small in size, making it possible to subject the sample to a wide range of test conditions. Because this test method does not contain a numerical precision and bias statement, it shall not be used as a referee test method in case of dispute.
SCOPE
1.1 This test method covers the determination of the thermal conductivity of plastics over a temperature range from –40 to 400°C. It is possible to measure the thermal conductivity of materials in the range from 0.08 to 2.0 W/m.K covering thermoplastics, thermosets, and rubbers, filled and reinforced.
1.2 The values stated in SI units shall be regarded as standard.
1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish proper safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this test method.
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Designation: D5930 − 16
Standard Test Method for
Thermal Conductivity of Plastics by Means of a Transient
1
Line-Source Technique
This standard is issued under the fixed designation D5930; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 Thistestmethodcoversthedeterminationofthethermal
3.1 Definitions—Terminology used in this standard is in
conductivity of plastics over a temperature range from –40 to
accordance with Terminology D883.
400°C. It is possible to measure the thermal conductivity of
3.2 Definitions of Terms Specific to This Standard:
materials in the range from 0.08 to 2.0 W/m.K covering
3.2.1 temperature transient, n—the temperature rise associ-
thermoplastics, thermosets, and rubbers, filled and reinforced.
ated with the perturbation of a system, initially at a uniform
1.2 The values stated in SI units shall be regarded as
temperature. The system does not attain thermal equilibrium
standard.
during the transient.
1.3 This standard does not purport to address the safety
3.2.2 thermal conductivity, n—the time rate of steady heat
concerns, if any, associated with its use. It is the responsibility
flow/unit area through unit thickness of a homogeneous mate-
of the user of this standard to establish proper safety and
rialinadirectionperpendiculartothesurfaceinducedbyaunit
health practices and determine the applicability of regulatory
temperature difference.
limitations prior to use.
3.2.2.1 Discussion—Where other modes of heat transfer are
NOTE 1—There is no known ISO equivalent to this test method.
present in addition to conduction, such as convection and
radiation, this property often is referred to as the apparent
2. Referenced Documents
thermal conductivity, λ .
app
2
2.1 ASTM Standards:
3.2.2.2 Discussion—Thermal conductivity must be associ-
C177 Test Method for Steady-State Heat Flux Measure-
ated with the conditions under which it is measured, such as
ments and Thermal Transmission Properties by Means of
temperature and pressure, as well as the compositional varia-
the Guarded-Hot-Plate Apparatus
tion of the material. It is possible that thermal conductivity will
C518 Test Method for Steady-State Thermal Transmission
vary with direction and orientation of the specimen since some
Properties by Means of the Heat Flow Meter Apparatus
materialsarenotisotropicwithrespecttothermalconductivity.
C1113 Test Method for Thermal Conductivity of Refracto-
In the case of thermoset polymers, it is possible that thermal
ries by Hot Wire (Platinum Resistance Thermometer
conductivity will vary with the extent of cure.
Technique)
D618 Practice for Conditioning Plastics for Testing 3.2.3 thermal diffusivity—a heat-transport property given by
the thermal conductivity divided by the thermal mass, which is
D883 Terminology Relating to Plastics
D2717 Test Method for Thermal Conductivity of Liquids a product of the density and the heat capacity.
E177 Practice for Use of the Terms Precision and Bias in
3.3 Symbols:
ASTM Test Methods
3.3.1 C—Probe constant.
E1225 Test Method for Thermal Conductivity of Solids
3.3.2 λ—Thermal conductivity, W/m.K.
Using the Guarded-Comparative-Longitudinal Heat Flow
Technique
3.3.3 Q—Heat output per unit length, W/m.
3.3.4 T —The temperature (K) recorded at time t .
2 2
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties.
3.3.5 T —The temperature (K) recorded at time t .
1 1
Current edition approved Sept. 1, 2016. Published September 2016. Originally
3.4 Subscript:
approved in 1997. Last previous edition approved in 2009 as D5930 - 09. DOI:
10.1520/D5930-16.
3.4.1 av—average.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.4.2 app—apparent.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 3.4.3 ref—reference.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D5930 − 16
4. Summary of Test Method
4.1 Line-Source Technique—This is a transient method for
3
determining thermal conductivity (1, 2). Aline source of heat
is located at the center of the specimen being tested. The
apparatus is at a constant initial temperature. During the course
of the measurement, a known amount of heat produced by the
line-source results in a
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5930 − 09 D5930 − 16
Standard Test Method for
Thermal Conductivity of Plastics by Means of a Transient
1
Line-Source Technique
This standard is issued under the fixed designation D5930; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*Scope
1.1 This test method covers the determination of the thermal conductivity of plastics over a temperature range from – 40 to
400°C. The –40 to 400°C. It is possible to measure the thermal conductivity of materials in the range from 0.08 to 2.0 W/m.K can
be measured covering thermoplastics, thermosets, and rubbers, filled and reinforced.
1.2 The values stated in SI units shall be regarded as standard.
1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the
user of this standard to establish proper safety and health practices and determine the applicability of regulatory limitations prior
to use.
NOTE 1—There is no known ISO equivalent to this test method.
2. Referenced Documents
2
2.1 ASTM Standards:
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C1113 Test Method for Thermal Conductivity of Refractories by Hot Wire (Platinum Resistance Thermometer Technique)
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D2717 Test Method for Thermal Conductivity of Liquids
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E1225 Test Method for Thermal Conductivity of Solids Using the Guarded-Comparative-Longitudinal Heat Flow Technique
3. Terminology
3.1 Definitions—Terminology used in this standard is in accordance with Terminology D883.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 temperature transient, n—the temperature rise associated with the perturbation of a system, initially at a uniform
temperature. The system does not attain thermal equilibrium during the transient.
3.2.2 thermal conductivity, n—the time rate of steady heat flow/unit area through unit thickness of a homogeneous material in
a direction perpendicular to the surface induced by a unit temperature difference.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.30 on Thermal Properties.
Current edition approved Aug. 15, 2009Sept. 1, 2016. Published September 2009September 2016. Originally approved in 1997. Last previous edition approved in
20012009 as D5930 - 01.D5930 - 09. DOI: 10.1520/D5930-09.10.1520/D5930-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3.2.2.1 Discussion—
Where other modes of heat transfer are present in addition to conduction, such as convection and radiation, this property often is
referred to as the apparent thermal conductivity, λ .
app
3.2.2.2 Discussion—
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5930 − 16
Thermal conductivity must be associated with the conditions under which it is measured, such as temperature and pressure, as well
as the compositional variation of the material. Thermal conductivity mayIt is possible that thermal conductivity will vary with
direction and orientation of the specimen since some materials are not isotropic with respect to thermal conductivity. In the case
of thermoset polymers, it is possible that thermal conductivity maywill vary with the extent of cure.
3.2.3 thermal diffusivity—a heat-transport property given by the thermal conductivity divided by the thermal mass, which is a
product of the density and the heat capacity.
3.3 Symbols:
3.3.1 C—Probe constant.
3.3.2 λ—Thermal conductivity, W/m.K.
3.3.3 Q—Heat output per unit length, W/m.
3.3.4 T —The temperature (K) recorded at time t .
2 2
3.3.5 T —The temperature (K) recorded at time t
...
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