Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between −30°C and 30°C with a Vitreous Silica Dilatometer

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

04-01-2016

Publisher

American Society for Testing and Materials

1.1This test method covers determination of the coefficient of linear thermal expansion for plastic materials having coefficients of expansion greater than 1 µm/(m.°C) by use of a vitreous silica dilatometer. At the test temperatures and under the stresses imposed, the plastic materials shall have a negligible creep or elastic strain rate or both, insofar as these properties would significantly affect the accuracy of the measurements.

1.1.1Test Method E228 shall be used for temperatures other than −30°C to 30°C.

1.1.2This test method shall not be used for measurements on materials having a very low coefficient of expansion (less than 1 µm/(m.°C). For materials having very low coefficient of expansion, interferometer or capacitance techniques are recommended.

1.1.3Alternative technique commonly used for measuring this property is thermomechanical analysis as described in Test Method E831, which permits measurement of this property over a scanned temperature range.

1.2The thermal expansion of a plastic is composed of a reversible component on which are superimposed changes in length due to changes in moisture content, curing, loss of plasticizer or solvents, release of stresses, phase changes and other factors. This test method is intended for determining the coefficient of linear thermal expansion under the exclusion of these factors as far as possible. In general, it will not be possible to exclude the effect of these factors completely. For this reason, the test method can be expected to give only an approximation to the true thermal expansion.

1.3The values stated in SI units are to be regarded as standard. The values in parentheses are for information only.

1.4This 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 determine the applicability of regulatory limitations prior to use.

Note 1:There is no known ISO equivalent to this standard.

Committee	D 20
DocumentType	Test Method
Pages	5
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 696 : 2008 : EDT 1

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ASTM D 883 : 2023	Standard Terminology Relating to Plastics
ASTM D 4065 : 2006	Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
ASTM E 228 : 2017	Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
ASTM D 883 : 2024	Standard Terminology Relating to Plastics
ASTM D 883 : 2022	Standard Terminology Relating to Plastics
ASTM D 883 : 2020 : REV B	Standard Terminology Relating to Plastics
ASTM E 691 : 2020	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2019 : EDT 1	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2023	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D 4065 : 2012	Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
ASTM E 691 : 2022	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM E 691 : 2009	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D 618 : 2013	Standard Practice for Conditioning Plastics for Testing
ASTM E 691 : 2021	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ASTM D 4065 : 1995	Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
ASTM E 228 : 2022	Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
ASTM D 618 : 2021	Standard Practice for Conditioning Plastics for Testing
ASTM D 4065 : 2001	Standard Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures

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ASTM D 696 : 2016

Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between −30°C and 30°C with a Vitreous Silica Dilatometer

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