ASTM D6341-10

Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between -30 and 140&#176F (-34.4 and 60&#176C)

SIGNIFICANCE AND USE
The coefficient of linear thermal expansion, α, between temperatures T1  and T2  for a specimen whose length is L0  at the reference temperature, is given by the following equation:
SCOPE
1.1 This test method covers the determination of the coefficient of linear thermal expansion for plastic lumber and plastic lumber shapes to two significant figures. The determination is made by taking measurements with a caliper at three discrete temperatures. At the test temperatures and under the stresses imposed, the plastic lumber shall have a negligible creep or elastic strain rate, or both, insofar as these properties would significantly affect the accuracy of the measurements.
1.1.1 This test method details the determination of the linear coefficient of thermal expansion of plastic lumber and plastic lumber shapes in their “as manufactured” form. As such, this is a test method for evaluating the properties of plastic lumber or shapes as a product and not a material property test method.
1.2 The thermal expansion of plastic lumber and shapes is composed of a reversible component on which it is possible to superimpose changes in length due to changes in moisture content, curing, loss of plasticizer or solvents, release of stresses, phase changes, voids, inclusions, and other factors. This test method is intended to determine the coefficient of linear thermal expansion under the exclusion of non-linear 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 a reasonable approximation but not necessarily precise determination of the linear coefficient of thermal expansion.
1.3 Plastic lumber and plastic lumber shapes are currently made predominately with recycled plastics where the product is non-homogeneous in the cross-section. However, it is possible that this test method will also be applicable to similar manufactured plastic products made from virgin resins or other plastic composite materials.
1.4 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.5 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 determine the applicability of regulatory limitations prior to use.
Note 1—There is no known ISO equivalent to this standard.

General Information

• Status: Historical
• Publication Date: 31-Aug-2010
• ICS: 17.040.99 - Other standards related to linear and angular measurements
• ICS: 83.140.99 - Other rubber and plastics products
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.20 - Plastic Lumber

Relations

• Replaces: ASTM D6341-98(2005) - Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between -30 and 140&#176F (-34.4 and 60&#176C)
• Effective Date: 01-Sep-2010
• Replaced By: ASTM D6341-13 - Standard Test Method for Determination of the Linear Coefficient of Thermal Expansion of Plastic Lumber and Plastic Lumber Shapes Between –30 and 140°F (–34.4 and 60°C)
• Effective Date: 01-Jun-2013
• Referred By: ASTM D6117-23 - Standard Test Methods for Mechanical Fasteners in Plastic Lumber and Shapes
• Effective Date: 01-Sep-2010
• Referred By: ASTM D7031-11(2019) - Standard Guide for Evaluating Mechanical and Physical Properties of Wood-Plastic Composite Products
• Effective Date: 01-Sep-2010
• Referred By: ASTM D6662-22 - Standard Specification for Polyolefin-Based Plastic Lumber Decking Boards
• Effective Date: 01-Sep-2010
• Referred By: ASTM D8484-23 - Standard Specification for Plastic Lumber Materials and Wood-Plastic Composite Materials Used as Exterior Wall Coverings
• Effective Date: 01-Sep-2010
• Referred By: ASTM D7568-23 - Standard Specification for Polyethylene-Based Structural-Grade Plastic Lumber for Outdoor Applications
• Effective Date: 01-Sep-2010
• Referred By: ASTM D7258-23 - Standard Specification for Polymeric Piles
• Effective Date: 01-Sep-2010

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: D6341 − 10
StandardTest Method for
Determination of the Linear Coefficient of Thermal
Expansion of Plastic Lumber and Plastic Lumber Shapes
1
Between –30 and 140°F (–34.4 and 60°C)
This standard is issued under the fixed designation D6341; 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 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers the determination of the coef-
responsibility of the user of this standard to establish appro-
ficient of linear thermal expansion for plastic lumber and
priate safety and health practices and determine the applica-
plastic lumber shapes to two significant figures. The determi-
bility of regulatory limitations prior to use.
nation is made by taking measurements with a caliper at three
discrete temperatures. At the test temperatures and under the
NOTE 1—There is no known ISO equivalent to this standard.
stresses imposed, the plastic lumber shall have a negligible
creep or elastic strain rate, or both, insofar as these properties 2. Referenced Documents
2
would significantly affect the accuracy of the measurements.
2.1 ASTM Standards:
1.1.1 Thistestmethoddetailsthedeterminationofthelinear
D618 Practice for Conditioning Plastics for Testing
coefficient of thermal expansion of plastic lumber and plastic
D883 Terminology Relating to Plastics
lumber shapes in their “as manufactured” form.As such, this is
D4065 Practice for Plastics: Dynamic Mechanical Proper-
a test method for evaluating the properties of plastic lumber or
ties: Determination and Report of Procedures
shapes as a product and not a material property test method.
D5033 GuideforDevelopmentofASTMStandardsRelating
to Recycling and Use of Recycled Plastics (Withdrawn
1.2 The thermal expansion of plastic lumber and shapes is
3
composed of a reversible component on which it is possible to 2007)
E831 Test Method for Linear Thermal Expansion of Solid
superimpose changes in length due to changes in moisture
content, curing, loss of plasticizer or solvents, release of Materials by Thermomechanical Analysis
stresses, phase changes, voids, inclusions, and other factors.
3. Terminology
This test method is intended to determine the coefficient of
linear thermal expansion under the exclusion of non-linear
3.1 Definitions:
factors as far as possible. In general, it will not be possible to
3.1.1 plastic lumber, n—a manufactured product composed
exclude the effect of these factors completely. For this reason,
of more than 50 weight percent resin, in which the product
the test method can be expected to give a reasonable approxi-
generally is rectangular in cross-section and typically supplied
mation but not necessarily precise determination of the linear
in board and dimensional lumber sizes, may be filled or
coefficient of thermal expansion.
unfilled, and may be composed of single or multiple resin
blends.
1.3 Plastic lumber and plastic lumber shapes are currently
made predominately with recycled plastics where the product
3.1.2 plastic lumber shape, n—a plastic lumber product
is non-homogeneous in the cross-section. However, it is
which is generally not rectangular in cross-section.
possible that this test method will also be applicable to similar
3.1.3 resin, n—a solid or pseudosolid organic material often
manufactured plastic products made from virgin resins or other
of high molecular weight, which exhibits a tendency to flow
plastic composite materials.
when subjected to stress, usually has a softening or melting
1.4 The values stated in inch-pound units are to be regarded
range, and usually fractures conchoidally. (D883)
as the standard. The SI units given in parentheses are for
information only.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
and is the direct responsibility of Subcommittee D20.20 on Plastic Lumber. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Sept. 1, 2010. Published September 2010. Originally the ASTM website.
3
approved in 1998. Last previous edition approved in 2005 as D6341 - 98(2005). The last approved version of this historical standard is referenced on
DOI: 10.1520/D6341-10. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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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:D6341–98 (Reapproved 2005) Designation: D6341 – 10
Standard Test Method for
Determination of the Linear Coefficient of Thermal
Expansion of Plastic Lumber and Plastic Lumber Shapes
1
Between –30 and 140°F [–34.4(–34.4 and 60°C]60°C)
This standard is issued under the fixed designation D6341; 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
1.1 Thistestmethodcoversthedeterminationofthecoefficientoflinearthermalexpansionforplasticlumberandplasticlumber
shapes to two significant figures. The determination is made by taking measurements with a caliper at three discrete temperatures.
At the test temperatures and under the stresses imposed, the plastic lumber shall have a negligible creep or elastic strain rate, or
both, insofar as these properties would significantly affect the accuracy of the measurements.
1.1.1 This test method details the determination of the linear coefficient of thermal expansion of plastic lumber and plastic
lumber shapes in their “as manufactured” form. As such, this is a test method for evaluating the properties of plastic lumber or
shapes as a product and not a material property test method.
1.2 The thermal expansion of plastic lumber and shapes is composed of a reversible component on which may be superimposed
it is possible to superimpose changes in length due to changes in moisture content, curing, loss of plasticizer or solvents, release
of stresses, phase changes, voids, inclusions, and other factors. This test method is intended to determine the coefficient of linear
thermalexpansionundertheexclusionofnon-linearfactorsasfaraspossible.Ingeneral,itwillnotbepossibletoexcludetheeffect
of these factors completely. For this reason, the test method can be expected to give a reasonable approximation but not necessarily
precise determination of the linear coefficient of thermal expansion.
1.3 Plastic lumber and plastic lumber shapes are currently made predominately with recycled plastics where the product is
non-homogeneous in the cross-section. However, it is possible that this test method maywill also be applicable to similar
manufactured plastic products made from virgin resins or other plastic composite materials.
1.4 The values stated in inch-pound units are to be regarded as the standard. The SI units given in bracketsparentheses are for
information only.
1.5 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 determine the applicability of regulatory
limitations prior to use.
NOTE1—There is no similar or equivalent ISO standard. 1—There is no known ISO equivalent to this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D4065 Practice for Plastics: Dynamic Mechanical Properties: Determination and Report of Procedures
D5033 Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics
E831 Test Method for Linear Thermal Expansion of Solid Materials by Thermomechanical Analysis
3. Terminology
3.1 Definitions:
3.1.1 plastic lumber, n—amanufacturedproductcomposedofmorethan50weightpercentresin,inwhichtheproductgenerally
is rectangular in cross-section and typically supplied in board and dimensional lumber sizes, may be filled or unfilled, and may
be composed of single or multiple resin blends.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.20 on Plastic Products.Lumber.
Current edition approved Nov.Sept. 1, 2005.2010. Published February 2006.September 2010. Originally approved in 1998. Last previous edition approved in 19982005
as D6341 - 98(2005). DOI: 10.1520/D6341-98R05.10.1520/D6341-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6341 – 10
3.1.2 plastic
...