1、Designation:D633911Standard Classification System for and Basis for SpecificationsforSyndiotactic Polystyrene Molding and Extrusion(SPS)1This standard is issued under the fixed designation D6339;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、 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.Scope*1.1 This classification system covers syndiotactic polysty-rene materials including homopolymer,copolyme
3、rs,blends,and impact modified,suitable for molding and extrusion.Recycled product will be addressed in a separate standard.1.2 This classification system and subsequent line callout(specification)are intended to provide a means of calling outplastic materials used in fabrication of end use items or
4、parts.It is not intended for the selection of matierials.Materialselection can be made by those having expertise in the plasticsfield only after careful consideration of the design and theperformance required of the part,the environment to which itwill be exposed,the fabrication process to be employ
5、ed,theinherent properties of the material other than those covered bythis classification system,and the economics.1.3 The properties included in this classification system arethose required to identify the compositions covered.Otherrequirements necessary to identify particular characteristicsimporta
6、nt to specialized applications are to be called out usingthe suffixes given in Section 5.NOTE1There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD618 Practice for Conditioning Pla
7、stics for TestingD638 Test Method for Tensile Properties of PlasticsD648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load in the Edgewise PositionD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD792 Test Method
8、s for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD1525 Test Method for Vicat Softening Temperature ofPlasticsD1600 Terminology forAbbreviated Terms Relat
9、ing to Plas-ticsD3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-alsD5630 Test Method for Ash Content in PlasticsE29 Practice for Using Signific
10、ant Digits in Test Data toDetermine Conformance with Specifications2.2 Military Standard:3MIL-STD-105 Sampling Procedure and Tables for Inspec-tion by Attributes2.3 ISO Standards:4ISO 751 and 2 Plastics:Determination of Temperature ofDeflection Under LoadISO 1791 Determination of Charpy Impact Stren
11、gthPart1:Non-Instrumented Impact TestISO 306 Plastics:Thermoplastic Materials-Determination ofVicat Softening Temperature(VST)ISO 5272 Plastics:Determination of Tensile Properties-Part 2:Test Conditions for Moulding and ExtrusionPlasticsISO 1133 PlasticsDetermination of the Melt Mass-FlowRate(MFR)an
12、d the Melt Volume-Flow Rate(MVR)ofThermoplasticsISO 1183-1 Plastics:Methods for Determining the Densityof Non-Cellular PlasticsPart 1:Immersion Method,1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on Ther
13、moplasticMaterials.Current edition approved Feb.1,2011.Published March 2011.Originallyapproved in 1998.Last previous edition approved in 2005 as D6339-05.DOI:10.1520/D6339-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Ann
14、ual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/dodssp.daps.dla.mil.4Available from American National Standards Inst
15、itute(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,West Conshohocken,PA 19428-2959.United States1 Liquid Pyknometer Method and Titration MethodISO 345
16、1-1 Plastics:Determination of Ash-Part 1 GeneralMethods3.Terminology3.1 DefinitionsThe terminology used in this classificationsystem is in accordance with Terminologies D883 and D1600.4.Classification4.1 Syndiotactic polystyrene materials are classified intogroups according to their composition.These groups aresubdivided into classes and grades as shown in the basicproperties table,Table SPS.Injection molded properties are thepreferred standard and are used for the basis of call outexamples.Call
