ASTM_D_8156_-_18.pdf

Designation:D815618Standard Classification System for and Basis of SpecificationsforThermoplastic Elastomer Copolyester Molding andExtrusion Materials(TPC)1This standard is issued under the fixed designation D8156;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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.Scope1.1 This classification system covers segmented block co-polyester elastomers suitable for molding and extrusion.1.2 This classification system allows for the use of seg-mented block copolyesther elastomers that are recycled pro-vided that the requirements as stated in this classificationsystem are met.The proportions of recycled material used,aswell as the nature and amount of any contaminant,however,cannot be covered practically in this specification.1.3 The properties included in this classification system arethose required to identify the compositions covered.It ispossible that there are other requirements necessary to identifyparticular characteristics important to specialized applications.One way of specifying them is by using the suffixes as given inSection 5.1.4 This classification system and subsequent line callout(specification)are intended to provide a means of calling outplastic materials used in the fabrication of end items or parts.It is not intended for the selection of materials.Materialselection is best made by those having expertise in the plasticfield after careful consideration of the design and the perfor-mance required of the part,the environment to which it will beexposed,the fabrication process to be employed,the costsinvolved,and the inherent properties of the material other thanthose covered by this classification system.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 The following precautionary caveat pertains only to thetest methods portion,Section 11,of this classification system.This standard does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety,health,and environmental practices and determine the appli-cability of regulatory limitations prior to use.NOTE1This standard,ISO 14910-1,and ISO 14910-2 address thesame subject matter,but differ in technical content.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 World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2240 Test Method for Rubber PropertyDurometer Hard-nessD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning CalorimetryD3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-alsD7209 Guide for Waste Reduction,Resource Recovery,andUse of Recycled Polymeric Materials and Products(With-drawn 2015)2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 ISO Standards:ISO 294-1 PlasticsInjection Moulding of Test Specimensof Thermoplastic MaterialsPart 1:General Principlesand Moulding of Multipurpose and Bar Test SpecimensISO 868 Plastics and Ebonite-Determination of IndentationHardness by Means of a Durometer(Shore Hardness)1This 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 June 1,2018.Published July 2018.DOI:10.1520/D8156-18.2The last approved version of this historical standard is referenced onwww.astm.org.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 of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 ISO 1133 Plastics-Determination of the Melt Mass-FlowRate(MFR)and the Melt VolumeFlow Rate(MVR)ofThermoplasticsISO 11357-3 AMD 1 Plastics-Differential Scanning Calo-rimetry(DSC)Part 3:Determination of Temperatureand Enthalpy of Melting and CrystallizationISO 7619:2010 Rubber,vulcanized or thermoplasticDetermination