ASTM D5721-22

Standard Practice for Air-Oven Aging of Polyolefin Geomembranes

SIGNIFICANCE AND USE
4.1 Under the conditions of this test, the specimens undergo degradation at a rate that is a function of the thermal endurance of the polyolefin geomembrane under examination.  
4.2 The rate of change of a particular property as a function of temperature may be evaluated using the temperatures and times outlined in Practice D3045.  
4.3 Any correlation between this practice and service life of polyolefin geomembranes must be determined for the particular application in which they are to be used.  
4.4 Air-oven aging can be used to evaluate and compare the performance of various heat stabilizer packages exposed to air oxidation.
SCOPE
1.1 This practice covers a means for estimating the resistance of polyolefin geomembranes to thermal aging in the presence of air.  
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 This practice is useful for the development of formulations of polyolefin geomembranes.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Dec-2021
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D35 - Geosynthetics
• Drafting Committee: D35.02 - Endurance Properties

Relations

• Refers: ASTM F412-20 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Apr-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5721 −22
Standard Practice 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 D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This practice covers a means for estimating the resis-
D1238 Test Method for Melt Flow Rates of Thermoplastics
tance of polyolefin geomembranes to thermal aging in the
by Extrusion Plastometer
presence of air.
D1505 Test Method for Density of Plastics by the Density-
1.2 This practice should be used as a guide to compare
Gradient Technique
thermal aging characteristics of materials as measured by the
D1525 Test Method for Vicat Softening Temperature of
change in some property of interest. This practice does not
Plastics
predict thermal aging characteristics where interactions be-
D1790 Test Method for Brittleness Temperature of Plastic
tween stress, environment, temperature, and time control
Sheeting by Impact
failure.
D3045 Practice for Heat Aging of Plastics Without Load
D4439 Terminology for Geosynthetics
1.3 This practice is useful for the development of formula-
tions of polyolefin geomembranes. D5885/D5885M Test Method for Oxidative Induction Time
of Polyolefin Geosynthetics by High-Pressure Differential
1.4 The values stated in SI units are to be regarded as
Scanning Calorimetry
standard. No other units of measurement are included in this
D6693/D6693M Test Method for Determining Tensile Prop-
standard.
erties of Nonreinforced Polyethylene and Nonreinforced
1.5 This standard does not purport to address all of the
Flexible Polypropylene Geomembranes
safety concerns, if any, associated with its use. It is the
D8117 Test Method for Oxidative Induction Time of Poly-
responsibility of the user of this standard to establish appro-
olefin Geosynthetics by Differential Scanning Calorimetry
priate safety, health, and environmental practices and deter-
E145 Specification for Gravity-Convection and Forced-
mine the applicability of regulatory limitations prior to use.
Ventilation Ovens
1.6 This international standard was developed in accor-
F412 Terminology Relating to Plastic Piping Systems
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.1 Definitions:
mendations issued by the World Trade Organization Technical
3.1.1 For definitions of general terms used in this standard,
Barriers to Trade (TBT) Committee.
refer to Terminology D4439.
3.1.2 aging, n—the process of exposing materials to an
2. Referenced Documents
environment for an interval of time.
2
2.1 ASTM Standards:
3.1.3 polyolefin, n—a polymer prepared by the polymeriza-
D618 Practice for Conditioning Plastics for Testing
tion of an olefin(s) as the sole monomer(s). (F412)
D638 Test Method for Tensile Properties of Plastics
3.1.4 Vicat softening point—the temperature at which a
D746 Test Method for Brittleness Temperature of Plastics
2
flat-ended needle of 1 mm circular cross section will penetrate
and Elastomers by Impact
a thermoplastic specimen to a depth of 1 mm under a specified
load using a selected uniform rate of temperature rise. (D1525)
1
This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-
4. Significance and Use
thetics and is the direct responsibility of Subcommittee D35.02 on Endurance
Properties.
4.1 Under the conditions of this test, the specimens undergo
Current edition approved Jan. 1, 2022. Published January 2022. Originally
degradation at a rate that is a function of the thermal endurance
approved in 1995. Last previous edition approved in 2018 as D5721 – 08 (2018).
of the polyolefin geomembrane under examination.
DOI: 10.1520/D5721-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2 The rate of change of a particular property as a function
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
of temperature may be evaluated using the temperatures and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. times outlined in Practice D3045.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5721 − 22
caused b
...

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 − 08 (Reapproved 2018) D5721 − 22
Standard Practice 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
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 This practice is useful for the development of formulations of polyolefin geomembranes.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D746 Test Method for Brittleness Temperature of Plastics and Elastomers by Impact
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D1525 Test Method for Vicat Softening Temperature of Plastics
D1790 Test Method for Brittleness Temperature of Plastic Sheeting by Impact
3
D1870 Practice for Elevated Temperature Aging Using a Tubular Oven (Withdrawn 1998)
D3045 Practice for Heat Aging of Plastics Without Load
1
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 June 1, 2018Jan. 1, 2022. Published June 2018January 2022. Originally approved in 1995. Last previous edition approved in 20132018 as
D5721 – 08 (2013).(2018). DOI: 10.1520/D5721-08R18.10.1520/D5721-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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
1

---------------------- Page: 1 ----------------------
D5721 − 22
D4439 Terminology for Geosynthetics
D5885/D5885M Test Method for Oxidative Induction Time of Polyolefin Geosynthetics by High-Pressure Differential Scanning
Calorimetry
D6693/D6693M Test Method for Determining Tensile Properties of Nonreinforced Polyethylene and Nonreinforced Flexible
Polypropylene Geomembranes
D8117 Test Method for Oxidative Induction Time of Polyolefin Geosynthetics by Differential Scanning Calorimetry
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
F412 Terminology Relating to Plastic Piping Systems
3. Terminology
3.1 Definitions:
3.1.1 For definitions of general terms used in this standard, refer to Terminology D4439.
3.1.2 aging, n—the process of exposing materials to an environment for an interval of time.
3.1.3 polyolefin, n—a polymer prepared by the polymerization of an olefin(s) as the sole monomer(s). (F412)
2
3.1.4 Vicat softening point—the temperature at which a flat-ended needle of 1-mm1 mm circular cross section will penetrate a
thermoplastic
...