ASTM_D_4474_-_00.pdf

Designation:D 4474 00Standard Classification System forStyrenic Thermoplastic Elastomer Injection Molding andExtrusion Materials(TES)1This standard is issued under the fixed designation D 4474;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(e)indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis classification system is intended to be a means of calling out materials used in the fabricationof end items or parts.It is not intended for the selection of materials.Material selection should bemade by those having expertise in the plastics field after careful consideration of the design andperformance required of the part,the environment to which it will be exposed,the fabrication processto be employed,the inherent properties of the material other than those covered by this classificationsystem,and the economics.1.Scope*1.1 This classification and subsequent line callout(specifi-cation)cover styrenic block copolymer thermoplastic elas-tomer materials for injection molding and extrusion.Copoly-mers consist of polystyrene segments bound to rubberysegments.The rubbery segments may be saturated or unsatur-ated.Compounding ingredients may be present as necessaryfor the application.The compounding ingredients may consistof reinforcements,resins,plasticizers,fillers,stabilizers,andcolorants.Recycled styrenic thermoplastic elastomers are notcovered in this classification.1.2 The properties included in this classification are thoserequired to identify the compositions covered.There may beother requirements necessary to identify particular character-istics that are important to specialized applications.These maybe described by using the suffixes specified in Section 5.1.3 The values stated in SI units,as detailed in IEEE/ASTM SI 10,are to be regarded as the standard.NOTE1There is no equivalent ISO standard.2.Referenced Documents2.1 ASTM Standards:D 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTension2D 618 Practice for Conditioning Plastics for Testing3D 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic Elastomers2D 790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-als3D 792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by Displacement3D 883 Terminology Relating to Plastics3D 1600 Terminology for Abbreviated Terms Relating toPlastics3D 1898 Practice for Sampling of Plastics4D 2240 Test Method for Rubber PropertyDurometerHardness2D 3892 Practice for Packaging/Packing of Plastics5D 4000 Classification System for Specifying Plastic Mate-rials5D 5740 Guide for Writing Material Standards in the Clas-sification D 4000 Format6E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specification7IEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System83.Terminology3.1 Definitions:3.1.1 For definitions of technical terms pertaining to plasticsused in this classification,see Terminology D 883.3.2 Definitions of Terms Specific to This Standard:3.2.1 styrenic thermoplastic elastomer(TES)a copolymermaterial comprising styrenic end-block segments which are1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved Nov.10,2000.Published February 2001.Originallypublished as D 4474 85.Last previous edition D 4474 96.2Annual Book of ASTM Standards,Vol 09.01.3Annual Book of ASTM Standards,Vol 08.01.4Discontinued 1998;see 1997 Annual Book of ASTM Standards,Vol 08.01.5Annual Book of ASTM Standards,Vol 08.02.6Annual Book of ASTM Standards,Vol 08.03.7Annual Book of ASTM Standards,Vol 14.02.8Annual Book of ASTM Standards,Vol 14.04.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.bound to a rubbery segment that may be saturated or unsatur-ated and which normally contain substantial amounts of addedmaterials such as other polymers,oils,fillers,and colorants.3.2.2 unsaturatedstyrenicthermoplasticelastomer(TESU)a copolymer material comprising styrenic end-blocks which are bound to an unsaturated rubbery segment.3.2.3 saturated styrenic thermoplastic elastomer(TESS)acopolymer material comprising styrenic end-blocks which arebound to a saturated rubbery segment.3.2.4 thermoplastic elastomers(TPE)a diverse family ofrubber-like materials that,unlike conventional vulcanized rub-bers,can be processed and recycled like thermoplastic mate-rials.4.Classification4.1 Styrenic thermoplastic elastomer materials are classifiedinto groups according to their basic composition.These groupsare