1、Designation: D5138 11Standard 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 th
2、e 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 liquid crystal poly-meric (LCP) materials suitable
3、for injection 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 res
4、ponsibility of the supplier and thebuyer of liquid crystal polymers that are recycled, reconsti-tuted, recycled-regrind, recovered, or reprocessed, or a combi-nation thereof, to ensure compliance.1.2 The properties included in this classification system arethose required to identify the compositions
5、 covered. Otherrequirements necessary 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)
6、 are intended to be a means of calling 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 performancer
7、equired 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.1.4 The values stated in SI units are to be regarded asstandard.1.5 The follow
8、ing precautionary caveat pertains only to thetest 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 andhe
9、alth practices and determine the applicability of regulatorylimitations prior to use.NOTE 1There is no known ISO equivalent to this classificationsystem.2. Referenced Documents2.1 ASTM Standards:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD618 Practice for Condit
10、ioning 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 Insulating MaterialsD883 Te
11、rminology Relating to PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD1600 Terminology for Abbreviated Terms Relating toPlasticsD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning Calo
12、rimetryD3641 Practice for Injection Molding Test Specimens ofThermoplastic 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 Specifyin
13、g Plastic Materi-alsD5630 Test Method for Ash Content in PlasticsD7209 Guide for Waste Reduction, Resource Recovery, andUse of Recycled Polymeric Materials and ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 IEC and ISO Standards:3IEC 112
14、 Recommended Method for Determining the Com-parative Tracking Index of Solid Insulation MaterialsIEC 243 Recommended Methods of Test for Electrical1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on Thermopl
15、asticMaterials.Current edition approved Sept. 1, 2011. Published September 2011. Originallyapproved in 1990. Last previous edition approved in 2006 as D5138 - 06. DOI:10.1520/D5138-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm
16、.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end
17、of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Strength of Solid Insulating Materials at Power Frequen-ciesISO 62 PlasticsDetermination of Water AbsorptionISO 75-1 Determination of Temperature of Deflection Un-der Lo
18、adGeneral Test MethodISO 75-2 Determination of Temperature of Deflection Un-der LoadPlastics and EboniteISO 178 PlasticsDetermination of Flexural Properties ofRigid MaterialsISO 180/1A PlasticsDetermination of Izod ImpactStrength of Rigid MaterialsISO 294-1 General Principles for Injection MoldingIS
19、O 527-1 PlasticsDetermination of Tensile PropertiesTest Conditions for Moulding and Extrusion of PlasticsISO 527-2 PlasticsDetermination of Tensile PropertiesTest Conditions for Moulding and Extrusion of PlasticsISO 604 PlasticsDetermination of Compressive Proper-tiesISO 3167 PlasticsMultipurpose Te
20、st SpecimensISO 3451-1 PlasticsDetermination of Ash ContentPart1: General MethodsISO 11357 Melt Point by Differential Scanning CalorimetryISO 11443 Melt Viscosity by Capillary Rheometry2.3 Military Standard:4MIL-M-24519 Molding PlasticsElectrical Thermoplas-tics2.4 Underwriters Laboratories (UL):5UL
21、 94 Test for Flammability of Plastic Materials for Partsin Devices and Appliances2.5 National Technical Information Service (NTIS):6AD297457 Procedure andAnalytical Method for Determin-ing Toxic Gases Produced by Synthetic Compounds3. Terminology3.1 DefinitionsExcept for the terms defined below, the
22、terminology used in this classification system is in accordancewith Terminologies D883 and D1600.3.2 Definition of Term Specific to This Standard:3.2.1 liquid crystal polymer (LCP)A family of thermo-plastic polymers which upon heating to the processing tem-perature, exhibit ordered structure and und
23、er shear, highlyaligned chains that are retained in the solid state. Liquid crystalpolymers are polymers that in the molten state exhibit birefrin-gence in polarized light.4. Classification4.1 The LCP materials are classified into groups accordingto their chemical composition. These groups are subdi
24、vided,whether reinforced or not, into classes based on thermalperformance as shown in Table LCP.NOTE 2An example of this classification system is as follows: Thespecification LCP0120 indicates the following LCP = liquid crystal poly-mer as found in Terminology D1600:01 = Unsubstituted, or methyl sub
25、stituted, wholly aromaticcopolyester, polyether, or polyester amide (group)2 = Medium temperature, DTUL = 220-260C (class)0 = Other (grade)4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.5Availa
26、ble from Underwriters Laboratories (UL), 2600 N.W. Lake Rd., Camas,WA 98607-8542, http:/.6Available from National Technical Information Service (NTIS), 5301 ShawneeRd., Alexandria, VA 22312, http:/www.ntis.gov.TABLE LCP Liquid Crystal PolymersClassificationGroup Description Class Description GradeAD
27、escription01 unsubstituted or methyl substituted, wholly aromaticcopolyester, polyether, or polyester amide1 high temperatureDTULB260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 260C02 medium temperatureDTUL = 220260C03 gene
28、ral purposeDTUL 260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 220C000 other 0 other 0ADescription unspecified.BDTUL is deflection temperature under load measured at 1.8 MPa and is determined in accordance with Table A or Table B.D5138 1124.1.1 To facilitate the incorporation of futur
29、e or specialmaterials, the “other” category for Group (00), Class (0), andGrade (0) is shown in Table LCP.4.2 Reinforced, filled, and lubricated versions of LCP ma-terials are classified in accordance with Tables LCP and TableA. Table LCP is used to specify the group or the group andclass of LCP and
30、 Table A is used to specify the propertyrequirements.NOTE 3Test specimens shall be prepared in accordance withISO 3167, Specimen Type 1A or Practice D3641 accordingly.NOTE 4A similar callout can be developed using Table B.4.2.1 Reinforced, filled, and lubricated variations of thebasic materials are
31、identified by a single letter that indicates thefiller, or reinforcement used, or both, and two digits thatindicate the nominal quantity in percent by weight. Thereinforcement letter designations and associated tolerancelevels are shown in the following table:Symbol MaterialTolerance(Based on Total
32、MassA)C carbon and graphite fiber 62%G glass 62%L lubricants (for example PTFE,graphite, silicone, andmolybdenum disulfide)depends upon material andprocess to be specifiedM mineral 62%R combinations of reinforce-ments or fillers, or both63 % for the totalAAsh content of filled, or reinforced materia
33、l, or both, is determined using eitherTest Method D5630 or ISO 3451-1 where applicable.NOTE 5This part of the system uses the percent of reinforcements oradditives, or both, in the callout of the modified basic material. The typesand percentages of reinforcements and additives are shown on thesuppli
34、ers technical data sheet unless they are proprietary in nature. Ifnecessary, additional callout of these reinforcements and additives can beaccomplished by the use of the suffix part of the system (see Section 5).4.2.2 Specific requirements shall be shown by a six-character specification. The specif
35、ication will consist of theletter A and the five digits comprising the cell numbers for theproperty requirements in the order as they appear in Table A.4.2.2.1 Although the values listed are necessary to includethe range of properties available in existing materials, this doesnot imply that every po
36、ssible combination of properties existsor can be obtained.4.2.3 When the grade or class of the basic material is notknown or is not important, the “0” classification shall be used.NOTE 6An example of this classification for specifying a reinforcedLCP material is given as follows: The specification L
37、CP0120G30A22450would indicate the following material requirements:LCP = Liquid Crystal Polymer as found in Terminology D160001 = Unsubstituted or methyl substituted, wholly aromatic copolyes-ter, polyether, or polyester amide (group),2 = medium temperature (class)0 = unspecified (grade)G30 = Glass r
38、einforced at 30 % nominal levelA = Table A property requirements2 = Tensile strength, min, 100 MPa2 = Flexural modulus, min, 8 GPa4 = Notched izod impact, min, 15 kJ/m5 = Deflection temperature under load, min, 260C at 1.8 MPa,0 = UnspecifiedIf no properties are specified, the specification would be
39、LCP0120G30A00000.5. Suffixes Requirements5.1 When additional requirements are needed that are notcovered by the basic requirements or cell-table requirements,they shall be indicated through the use of suffixes.5.2 A list of suffixes is found in Classification SystemD4000 (Table 3) and are used for a
40、dditional requirements asappropriate.5.2.1 Additional suffixes will be added to that standard astest methods and requirements are developed and requested.6. General Requirements6.1 The composition of the specified material shall beuniform and shall conform to the requirements specifiedherein.6.2 The
41、 basic requirements from the property tables or celltables are always in effect unless superseded by specific suffixrequirements, which always take precedence.7. Detail Requirements7.1 The material shall conform to the requirements pre-scribed in Tables LCPandA(or B), and the suffix requirementsas t
42、hey apply.7.2 For the purposes of determining conformance with thisclassification system, all specified limits for a specificationTABLE A Property Requirements for Liquid Crystal Polymer Based on ISO Test Methods0 1234 5 67 8 91 Tensilestrength,min, MPaISO 527 unspecified 70 100 120 140 160 180 200
43、220 specifyvalue2 Flexuralmodulus,min, GPaISO 178 unspecified 4 8 12 16 20 24 28 32 specifyvalue3 Notchedizodimpact,min, kJ/m2ISO 180/1A unspecified 5 9 12 15 18 25 37 50 specifyvalue4 DTULAat1.8 MPa,min, CISO 75/A unspecified 140 180 220 240 260 300 340 380 specifyvalue5Tobedeterminedunspecified sp
44、ecifyvalueADTUL = Deflection temperature under load tested flatwise on 80 by 10 by 4-mm specimen.D5138 113(line callout) based on this classification system are absolutelimits, as defined in Practice E29.7.3 With the absolute method, an observed value or acalculated value is not rounded, but is to b
45、e compared directlywith the limiting value. Conformance or nonconformance isbased on this comparison.8. Sampling8.1 Sampling shall be statistically adequate to satisfy therequirements of 12.4.8.2 A batch or lot shall be constituted as a unit of manufac-ture as prepared for shipment. A batch or lot i
46、s allowed toconsist of a blend of two or more production runs.9. Specimen Preparation9.1 The moisture content of the molding material for thepreparation of test specimens shall not exceed 0.01 %. Materialhaving a moisture content above these limits shall be dried inaccordance with the instructions o
47、f the manufacturer.9.2 The test specimens shall be prepared by an injectionmolding process as specified in ISO 294-1 for Table A orPractice D3641 for Table B. The processing conditions speci-fied in Table 4 are guidelines only. Since mechanical propertiescan vary depending on the molding conditions,
48、 contact themanufacturer of the grade for molding conditions appropriatefor specification purposes.9.3 Because of the shear sensitivity of LCP materials,occasionally a gate smaller than the gate specified by themolding practice or method is required to fill the part ad-equately. When reporting data
49、in accordance with a specifica-tion (line callout), the gate design shall be reported if differentthan the applicable molding practice ro method requirement.10. Conditioning10.1 Test specimens shall be conditioned in the standardlaboratory atmosphere for a minimum of 12 h (condition12/23/50 of Practice D618).11. Test Methods11.1 Determine the properties enumerated in this classifica-tion system by means of the test methods referenced in Section2.12. Certification and Inspection12.1 Inspection and certification of the material su
