1、Designation:D633911(Reapproved 2019)Standard 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
2、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.Scope*1.1 This classification system covers syndiotactic polysty-rene materials including hom
3、opolymer,copolymers,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
4、end use items or 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 pro
5、cess to be employed,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 chara
6、cteristicsimportant to specialized applications are to be called out usingthe suffixes given in Section 5.NOTE1There is no known ISO equivalent to this standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in
7、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:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of Plast
8、icsD618 Practice for Conditioning Plastics 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
9、Insulating Materi-alsD792 Test Methods 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 T
10、erminology forAbbreviated Terms Relating 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 Pl
11、asticsE29 Practice for Using Significant 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
12、 Determination of Charpy Impact StrengthPart1:Non-Instrumented Impact TestISO 306 Plastics:Thermoplastic Materials-Determination ofVicat Softening Temperature(VST)1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D2
13、0.15 on ThermoplasticMaterials.Current edition approved April 1,2019.Published May 2019.Originallyapproved in 1998.Last previous edition approved in 2011 as D6339 11.DOI:10.1520/D6339-11R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servicea
14、stm.org.For Annual 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
15、 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,West Conshohocken,PA 19428-2959.United StatesThis international standard was develop
16、ed 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 5272 Plastics:Determination of Tensile Properties-Part 2:Test Conditions for Moulding and ExtrusionPlasticsISO 1133 PlasticsDetermination of the Melt Mass-FlowRate(MFR)and the Melt Volume-Flow Rate(MVR)ofThermoplasticsI