ASTM D5930-97

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 5930 – 97
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
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 D 5930; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This test method covers the determination of the thermal 3.1 Definitions—Terminology used in this standard is in
conductivity of plastics over a temperature range from – 40 to accordance with Terminology D 883.
400°C. The thermal conductivity of materials in the range from 3.2 Definitions of Terms Specific to This Standard:
0.08 to 2.0 W/m.K can be measured covering thermoplastics, 3.2.1 temperature transient, n—the temperature rise associ-
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 are to 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
flow/unit area through unit thickness of a homogeneous mate-
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish proper safety and rial in a direction perpendicular to the surface induced by a unit
temperature difference.
health practices and determine the applicability of regulatory
limitations prior to use. 3.2.2.1 Discussion—Where other modes of heat transfer are
present in addition to conduction, such as convection and
NOTE 1—There is no current ISO document that duplicates this test
radiation, this property often is referred to as the apparent
method.
thermal conductivity, l .
app
3.2.2.2 Discussion—Thermal conductivity must be associ-
2. Referenced Documents
ated with the conditions under which it is measured, such as
2.1 ASTM Standards:
temperature and pressure, as well as the compositional varia-
C 177 Test Method for Steady-State Heat Flux Measure-
tion of the material. Thermal conductivity may vary with
ments and Thermal Transmission Properties by Means of
2 direction and orientation of the specimen since some materials
the Guarded-Hot-Plate Apparatus
are not isotropic with respect to thermal conductivity.
C 518 Test Method for Steady-State Heat Flux and Thermal
3.2.3 thermal diffusivity—a heat-transport property given by
Transmission Properties by Means of the Heat Flow Meter
the thermal conductivity divided by the thermal mass, which is
2
Apparatus
a product of the density and the heat capacity.
C 1113 Test Method for Thermal Conductivity of Refracto-
3.3 Symbols:
ries by Hot Wire (Platinum Resistance Thermometer Tech-
3 3.3.1 C—Probe constant.
nique)
3.3.2 l—Thermal conductivity, W/m.K.
C Test Method for Thermal Conductivity of Solids by
3.3.3 Q—Heat output per unit length, W/m.
Means of the Guarded-Comparative-Longitudinal Heat
3.3.4 T —The temperature (K) recorded at time t .
2 2
Flow Technique
3.3.5 T —The temperature (K) recorded at time t .
4
1 1
D 618 Practice for Conditioning Plastics for Testing
4 3.4 Subscript:
D 883 Terminology Relating to Plastics
3.4.1 av—average.
5
D 2717 Test Method for Thermal Conductivity of Liquids
3.4.2 app—apparent.
E 177 Practice for Use of the Terms Precision and Bias in
3.4.3 ref—reference.
6
ASTM Test Methods
4. Summary of Test Method
4.1 Line-Source Technique—This is a transient method for
1
7
This test method is under the jurisdiction of ASTM Committee D-20 on Plastics
determining thermal conductivity (1, 2). A line source of heat
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties.
is located at the center of the specimen being tested. The
Current edition approved July 10, 1997. Published May 1998.
2 apparatus is at a constant initial temperature. During the course
Annual Book of ASTM Standards, Vol 04.06.
3
Annual Book of ASTM Standards, Vol 15.01.
4
Annual Book of ASTM Standards, Vol 08.01.
5 7
Annual Book of ASTM Standards, Vol 05.02. The boldface numbers in parentheses refer to the list of references at the end of
6
Annual Book of ASTM Standards, Vol 14.02. this standard.
1

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D 5930
of the measurement, a known amount of heat produced by the where the contact resistance does not contribute to the mea-
line-source results in a heat wave propagating radially into the sured transient (7).
...