1、Designation:D301219Standard Test Method forThermal-Oxidative Stability of Polypropylene Using aSpecimen Rotator Within an Oven1This standard is issued under the fixed designation D3012;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,
2、the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method provides a means for estimating theresistance of polypropylene,in molded form,to accelerateda
3、ging by heat in the presence of air using a forced draft oven.1.2 The stability determined by this test method is notdirectly related to the suitability of the material for use whendifferent environmental conditions prevail and shall not beused to predict performance.NOTE1The specified thermal level
4、s in this test method are consideredsufficiently severe to cause failure of commercial grades of heat-stablepolypropylene within a reasonable period of time.If desired,lowertemperatures can be applied to estimate the performance of polypropylenewith lower heat stabilities.1.3 The values stated in SI
5、 units are to be regarded as thestandard.The values in parentheses are for information only.1.4 This standard 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 environm
6、ental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE2This test method and ISO 45771983 are technically similarbut different in preparation of test specimens,thickness of test specimen,measurement of the number of air flow changes in the ovens,and thenumber of
7、air changes per hour required.1.5 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 World Trade Orga
8、nization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD4101 Classification
9、System and Basis for Specification forPolypropylene Injection and Extrusion MaterialsD5374 Test Methods for Forced-Convection Laboratory Ov-ens for Evaluation of Electrical InsulationE77 Test Method for Inspection and Verification of Ther-mometersE220 Test Method for Calibration of Thermocouples ByC
10、omparison TechniquesE456 Terminology Relating to Quality and StatisticsE608/E608M Specification for Mineral-Insulated,Metal-Sheathed Base Metal ThermocouplesE644 Test Methods for Testing Industrial Resistance Ther-mometersE691 Practice for Conducting an Interlaboratory Study toDetermine the Precisio
11、n of a Test MethodE1137/E1137M Specification for Industrial Platinum Resis-tance ThermometersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision LiquidsE2935 Practice for Conducting Equivalence Testing inLaboratory Applications2.2 ISO Standard:3ISO 45771983 PlasticsP
12、olypropylene and PropyleneCopolymersDetermination of Thermal Oxidative Sta-bility in Air-Oven Method1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materi-als.Current edition approved April 1,2019.P
13、ublished May 2019.Originallyapproved in 1972.Last previous edition approved in 2013 as D3012-13.DOI:10.1520/D3012-19.2For 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
14、standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,
15、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 of International Standards,Guides and Recommendations issued by the World Tr
16、ade Organization Technical Barriers to Trade(TBT)Committee.1 ISO 19069 PlasticsPolypropylene(PP)Moulding and Ex-trusion Materials:Part 1:Designation System and Basis for SpecificationsPart 2:Preparation of Test Specimens and Determination ofProperties3.Terminology3.1 DefinitionsTerms used in this standard are defined inaccordance with Terminology D883,unless otherwise speci-fied.For terms relating to precision and bias and associatedissues,the terms used in this standard are defined in accordanc
