ASTM D5721-08
(Practice)Standard Practice for Air-Oven Aging of Polyolefin Geomembranes
Standard Practice for Air-Oven Aging of Polyolefin Geomembranes
SIGNIFICANCE AND USE
Under the severe conditions of this test, the specimens undergo degradation at a rate that is a function of the thermal endurance of the geomembrane under examination.
The elevated temperature for this practice should represent conditions that are sufficiently severe to induce failure of polyolefin geomembranes within an abbreviated period of time.
The rate of change of a particular property as a function of temperature may be evaluated using the temperatures and times outlined in Practice D 3045.
Any correlation between this practice and natural life of these materials must be determined for the particular application in which the materials are to be used.
Air-oven aging can be used to evaluate and compare the performance of various heat stabilizer packages.
SCOPE
1.1 This practice covers a means for estimating the resistance of polyolefin geomembranes to thermal aging in the presence of air. Only the procedure for heat exposure is specified, not the test method or specimen. The effect of heat on any particular property may be determined by selection of the appropriate test method and specimen.
1.2 This practice should be used as a guide to compare thermal aging characteristics of materials as measured by the change in some property of interest. This practice does not predict thermal aging characteristics where interactions between stress, environment, temperature, and time control failure.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 determine the applicability of regulatory limitations prior to use.
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Designation: D5721 −08
StandardPractice for
1
Air-Oven Aging of Polyolefin Geomembranes
This standard is issued under the fixed designation D5721; 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 D1790 Test Method for Brittleness Temperature of Plastic
Sheeting by Impact
1.1 This practice covers a means for estimating the resis-
D1870 Practice for Elevated Temperature Aging Using a
tance of polyolefin geomembranes to thermal aging in the
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Tubular Oven (Withdrawn 1998)
presence of air. Only the procedure for heat exposure is
D3045 Practice for Heat Aging of Plastics Without Load
specified, not the test method or specimen. The effect of heat
D4439 Terminology for Geosynthetics
on any particular property may be determined by selection of
E145 Specification for Gravity-Convection and Forced-
the appropriate test method and specimen.
Ventilation Ovens
1.2 This practice should be used as a guide to compare
F412 Terminology Relating to Plastic Piping Systems
thermal aging characteristics of materials as measured by the
change in some property of interest. This practice does not
3. Terminology
predict thermal aging characteristics where interactions be-
3.1 Definitions:
tween stress, environment, temperature, and time control
3.1.1 For definitions of general terms used in this standard,
failure.
refer to Terminology D4439.
1.3 The values stated in SI units are to be regarded as
3.1.2 aging, n—the process of exposing materials to an
standard. No other units of measurement are included in this environment for an interval of time.
standard.
3.1.3 polyolefin, n—a polymer prepared by the polymeriza-
1.4 This standard does not purport to address all of the tion of an olefin(s) as the sole monomer(s). (F412)
safety concerns, if any, associated with its use. It is the
3.1.4 Vicat softening point—the temperature at which a
2
responsibility of the user of this standard to establish appro-
flat-ended needle of 1 mm circular cross section will penetrate
priate safety and health practices and determine the applica-
a thermoplastic specimen to a depth of 1 mm under a specified
bility of regulatory limitations prior to use.
load using a selected uniform rate of temperature rise. (D1525)
2. Referenced Documents
4. Significance and Use
2
2.1 ASTM Standards:
4.1 Under the severe conditions of this test, the specimens
D618 Practice for Conditioning Plastics for Testing
undergo degradation at a rate that is a function of the thermal
D638 Test Method for Tensile Properties of Plastics
endurance of the geomembrane under examination.
D746 Test Method for Brittleness Temperature of Plastics
4.2 The elevated temperature for this practice should repre-
and Elastomers by Impact
sent conditions that are sufficiently severe to induce failure of
D1238 Test Method for Melt Flow Rates of Thermoplastics
polyolefin geomembranes within an abbreviated period of
by Extrusion Plastometer
time.
D1505 Test Method for Density of Plastics by the Density-
Gradient Technique
4.3 The rate of change of a particular property as a function
D1525 Test Method for Vicat Softening Temperature of
of temperature may be evaluated using the temperatures and
Plastics
times outlined in Practice D3045.
4.4 Any correlation between this practice and natural life of
1
This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-
these materials must be determined for the particular applica-
thetics and is the direct responsibility of Subcommittee D35.02 on Endurance
tion in which the materials are to be used.
Properties.
Current edition approved July 1, 2008. Published July 2008. Originally approved
4.5 Air-oven aging can be used to evaluate and compare the
in 1995. Last previous edition approved in 2002 as D5721–95(2002). DOI:
performance of various heat stabilizer packages.
10.1520/D5721-08.
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
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5721 − 08
5. Apparatus 8.5 At the end of an aging interval, remove a set of
specimens and allow them to cool. Test the specimens for the
5.1 Oven—A controlled, forced–ventilation oven with sub-
selected property in accordance with the appropriate test
stantial fresh air
...
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:D5721–95 (Reapproved 2002) Designation: D 5721 – 08
Standard Practice for
1
Air-Oven Aging of Polyolefin Geomembranes
This standard is issued under the fixed designation D 5721; 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 This practice covers a means for estimating the resistance of polyolefin geomembranes to thermal aging in the presence of
air.Onlytheprocedureforheatexposureisspecified,notthetestmethodorspecimen.Theeffectofheatonanyparticularproperty
may be determined by selection of the appropriate test method and specimen.
1.2 This practice should be used as a guide to compare thermal aging characteristics of materials as measured by the change
in some property of interest. This practice does not predict thermal aging characteristics where interactions between stress,
environment, temperature, and time control failure.
1.3The values stated in SI units are to be regarded as the standard.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D 618Practice for Conditioning Plastics and Electrical Insulating Materials for Testing Practice for Conditioning Plastics for
Testing
D 638 Test Method for Tensile Properties of Plastics
D 746 Test Method for Brittleness Temperature of Plastics and Elastomers by Impact
D 1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
D 1505 Test Method for Density of Plastics by the Density-Gradient Technique
D 1525 Test Method for Vicat Softening Temperature of Plastics
2
D 1790Test Method for Brittleness Temperature of Plastic Film by Impact
2
D1822TestMethodforTensile-ImpactEnergytoBreakPlasticsandElectricalInsulatingMaterials TestMethodforBrittleness
Temperature of Plastic Sheeting by Impact
3
D 1870 Practice for Elevated Temperature Aging Using a Tubular Oven
D 3045 Practice for Heat Aging of Plastics Without Load
D 4439Terminology for Geotextiles Terminology for Geosynthetics
E 145Specifications for Gravity—Convection and Forced—Ventilation Ovens Specification for Gravity-Convection and
Forced-Ventilation Ovens
F412 Terminology Relating to Plastic Piping Systems
F869Definitions of Terms Relating to Athletic Shoes and Biomechanics 412 Terminology Relating to Plastic Piping Systems
3. Terminology
3.1 Definitions:
3.1.1Definitions:
3.1.1 For definitions of general terms used in this standard, refer to Terminology D 4439.
3.1.2 aging, n—the process of exposing materials to an environment for an interval of time. (F869)
3.1.2geomembrane, n—an essentially impermeable geosynthetic composed of one or more synthetic sheets. (D4439)
3.1.3 polyolefin, n—a polymer prepared by the polymerization of an olefin(s) as the sole monomer(s). (F 412)
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This practice is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.02 on Endurance Properties.
Current edition approved April 15, 1995. Published June 1995.
Current edition approved July 1, 2008. Published July 2008. Originally approved in 1995. Last previous edition approved in 2002 as D 5721–95(2002).
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 08.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5721–08
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3.1.4 Vicat softening point—the temperature at which a flat-ended needle of 1 mm circular cross section will penetrate a
thermoplastic specimen to a depth of 1 mm under a specified load using a selected uniform rate of temperature rise. (D 1525)
4. Significance and Use
4.1 Under the severe conditions of this test, the specimens undergo degradation at a rate that is a function of the thermal
endurance of the geomem
...
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