1、Designation:D5885/D5885M20Standard Test Method forOxidative Induction Time of Polyolefin Geosynthetics byHigh-Pressure Differential Scanning Calorimetry1This standard is issued under the fixed designation D5885/D5885M;the number immediately following the designation indicates theyear of original ado
2、ption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a procedure for the determina-tion of the oxidative in
3、duction time(OIT)of polyolefingeosynthetics using high-pressure differential scanning calo-rimetry.1.2 The focus of the test is on geomembranes,but geogrids,geonets,geotextiles,and other polyolefin-related geosyntheticsare also suitable for such evaluation.1.3 This test method measures the oxidative
4、 induction timeassociated with a given test specimen at a specified temperatureand pressure.1.4 This is an accelerated test for highly stabilized materials.It is applicable only to material whose OIT values under3.4 MPa of oxygen are greater than 30 min at 150 C.1.5 The values stated in either SI un
5、its or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.6 This st
6、andard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precau
7、tionary statements are given in Section 8.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the Worl
8、d Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D3895 Test Method for Oxidative-Induction Time of Poly-olefins by Differential Scanning CalorimetryD4439 Terminology for GeosyntheticsD4491/D4491M Test Methods for Water Permeability ofGeotextiles
9、 by PermittivityD4565 Test Methods for Physical and Environmental Per-formance Properties of Insulations and Jackets for Tele-communications Wire and CableD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens,Plaques,or SheetsD8117 Test Method for Oxidative Induction Time
10、 of Poly-olefin Geosynthetics by Differential Scanning CalorimetryE473 Terminology Relating to Thermal Analysis and Rhe-ologyE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE967 Test Method for Temperature Calibration of Differen-tial Scanning Calorime
11、ters and Differential Thermal Ana-lyzersG88 Guide for Designing Systems for Oxygen Service3.Terminology3.1 Definitions:3.1.1 For definitions of terms related to geosynthetics,referto Terminology D4439.3.1.2 Definitions of terms applying to thermal analysisappear in Terminology E473.3.2 Definitions o
12、f Terms Specific to This Standard:3.2.1 differential scanning calorimetry(DSC),na tech-nique in which the difference in heat flow inputs into asubstance and a reference material is measured as a function oftemperature or time,while the substance and reference materialare subjected to a controlled-te
13、mperature program.(See Ter-minology E473.)1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.02 on Endur-ance Properties.Current edition approved Sept.1,2020.Published September 2020.Originallyapproved in 1995.Last p
14、revious edition approved in 2017 as D5885/D5885M 17.DOI:10.1520/D5885_D5885M-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe
15、 ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment
16、 of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.2.2 geomembrane,nan essentially impermeable geosyn-thetic composed of one or more synthetic sheets.(See Termi-nology D4439.)3.2.2.1 DiscussionIn this test method,essentially imper-meable means that no measurable liquid flows through ageosynthetic when tested in accordance with Test MethodsD4491/D4491M.3.2.3 geosynthetic,na planar product manufactured frompoly
