1、Designation:D513816Standard Classification System and Basis for Specification forLiquid Crystal Polymers Molding and Extrusion Materials(LCP)1This standard is issued under the fixed designation D5138;the number immediately following the designation indicates the year oforiginal adoption or,in the ca
2、se 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 liquid crystal poly-meric(LCP)materials suitable for injectio
3、n molding andextrusion.This classification system allows the use of liquidcrystal polymers that are recycled,reconstituted,recycled-regrind,recovered,or reprocessed,or a combination thereof,provided that the requirements as stated in this classificationsystem are met.It is the responsibility of the
4、supplier and thebuyerofliquidcrystalpolymersthatarerecycled,reconstituted,recycled-regrind,recovered,or reprocessed,or acombination thereof,to ensure compliance.1.2 The properties included in this classification system arethose required to identify the compositions covered.Otherrequirements necessar
5、y to identify particular characteristicsimportant to specialized applications are allowed.These shallbe agreed upon between the user and the supplier,by usingsuffixes as given in Section 5.1.3 This classification system and subsequent line callout(specification)are intended to be a means of calling
6、out plasticmaterials used in the fabrication of end-use items or parts.It isnot intended for the selection of materials.Material selectioncan be made by those having expertise in the plastics field aftercareful consideration of the design and the performancerequired of the part,the environment to wh
7、ich 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.1.4 The values stated in SI units are to be regarded asstandard.1.5 The following precautionary caveat pertains only to the
8、test method 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 andhealth practices and determine the applicability of
9、regulatorylimitations prior to use.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 Plastics for TestingD638 Test Method for Tensile Properti
10、es 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-alsD883 Terminology Relating to PlasticsD1238 Test Method for Melt Flow R
11、ates of Thermoplasticsby Extrusion PlastometerD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning CalorimetryD3641 Practice for Injection Molding Test Specimens ofT
12、hermoplastic Molding and Extrusion MaterialsD3835 Test Method for Determination of Properties ofPolymeric Materials by Means of a Capillary RheometerD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Specifying Plastic Materi-alsD5630 Test Method for Ash Content in Plast
13、icsD7209 Guide for Waste Reduction,Resource Recovery,andUse of Recycled Polymeric Materials and Products(With-drawn 2015)3E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications1This classification system is under the jurisdiction ofASTM Committee D20 onPla
14、stics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1990.Last previous edition approved in 2011 as D5138-11.DOI:10.1520/D5138-16.2For referenced ASTM standards,visit the ASTM website,
15、www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appear
16、s at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.2 IEC and ISO Standards:4IEC 112 Recommended Method for Determining the Com-parative Tracking Index of Solid Insulation MaterialsIEC 243 Recommended Methods of Test for ElectricalStrength of Solid Insulating Materials at Power Frequen-ciesISO 62 PlasticsDetermination of Water AbsorptionISO 75-1 Determination of Temperature of Deflection Un-der LoadGeneral T
