1、Designation: D 5138 06Standard Classification System forLiquid Crystal Polymers (LCP)1This standard is issued under the fixed designation D 5138; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number i
2、n parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 injection molding andextrusion. This classification
3、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 supplier and thebuyer of liquid cryst
4、al 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 covered. There maybe other requirements necessary to id
5、entify particular charac-teristics important to specialized applications. These shall beagreed 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 out plasticmat
6、erials used in the fabrication of end-use items or parts. It isnot intended for the selection of materials. Material selectionshould be made by those having expertise in the plastics fieldafter careful consideration of the design and the performancerequired of the part, the environment to which it w
7、ill 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 thetest
8、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.NOTE 1There is no known ISO equivalent to this classificationsystem.2. Referenced Documents2.1 ASTM Standards:2D 256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD 618 Practice for Conditioning Plastics for TestingD 638 Test Method for
10、 Tensile Properties of PlasticsD 648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load in the Edgewise PositionD 790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating MaterialsD 883 Terminology Relating to PlasticsD 1238 Test Me
11、thod for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 3418 Test Method for Transition Temperatures of Poly-mers By Differential Scanning CalorimetryD 3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding a
12、nd Extrusion MaterialsD 3835 Test Method for Determination of Properties ofPolymeric Materials by Means of a Capillary RheometerD 3892 Practice for Packaging/Packing of PlasticsD 4000 Classification System for Specifying Plastic Mate-rialsD 5033 Guide for Development of ASTM Standards Relat-ing to R
13、ecycling and Use of Recycled PlasticsD 5630 Test Method for Ash Content in PlasticsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 IEC and ISO Standards:3IEC 112 Recommended Method for Determining the Com-parative Tracking Index of Solid Insulati
14、on 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 Test Method1This classification system is under the jurisdi
15、ction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved March 15, 2006. Published May 2006. Originallyapproved in 1990. Last previous edition approved in 1999 as D 5138 - 99a.2For referenced ASTM standards, visi
16、t the ASTM website, 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.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York,
17、 NY 10036.1*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.ISO 75-2 Determination of Temperature of Deflection Un-der LoadPlastics and EboniteISO 178 PlasticsDeterminat
18、ion of Flexural Properties ofRigid MaterialsISO 180/1A PlasticsDetermination of Izod ImpactStrength of Rigid MaterialsISO 294-1 General Principles for Injection MoldingISO 527-1 PlasticsDetermination of Tensile PropertiesTest Conditions for Moulding and Extrusion of PlasticsISO 527-2 PlasticsDetermi
19、nation of Tensile PropertiesTest Conditions for Moulding and Extrusion of PlasticsISO 604 PlasticsDetermination of Compressive Proper-tiesISO 3167 PlasticsMultipurpose Test SpecimensISO 3451-1 PlasticsDetermination of Ash ContentPart1: General MethodsISO 11357 Melt Point by Differential Scanning Cal
20、orimetryISO 11443 Melt Viscosity by Capillary Rheometry2.3 Military Standard:4MIL-M-24519 Molding PlasticsElectrical Thermoplas-tics2.4 Underwriters Laboratories (UL):5UL 94 Test for Flammability of Plastic Materials for Partsin Devices and Appliances2.5 National Technical Information Service (NTIS)
21、:6AD297457 Procedure andAnalytical Method for Determin-ing Toxic Gases Produced by Synthetic Compounds3. Terminology3.1 DefinitionsExcept for the terms defined below, theterminology used in this classification system is in accordancewith Terminologies D 883 and D 1600.3.2 Definition of Term Specific
22、 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 under shear, highlyaligned chains that are retained in the solid state. Liquid crystalpolymers are polymers that in the molten stat
23、e exhibit birefrin-gence in polarized light.4. Classification4.1 The LCP materials are classified into groups accordingto their chemical composition. These groups are subdivided,whether reinforced or not, into classes based on thermalperformance as shown in Table LCP.NOTE 2An example of this classif
24、ication system is as follows: Thedesignation LCP0120 indicates the following LCP = liquid crystal poly-mer as found in Terminology D 1600:01 = Unsubstituted, or methyl substituted, wholly aromaticcopolyester, polyether, or polyester amide (group)2 = Medium temperature, DTUL = 220-260C (class)0 = Oth
25、er (grade)4.1.1 To facilitate the incorporation of future 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 us
26、ed to specify the group or the group andclass of LCP and Table A is used to specify the propertyrequirements.4Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.5Available from Underwriters Laboratories (UL), Corporate Pr
27、ogress, 333Pfingsten Rd., Northbrook, IL 60062.6Available from NTIS, 5285 Port Royal Rd., Springfield, VA 22161.TABLE LCP Liquid Crystal PolymersClassificationGroup Description Class Description GradeADescription01 unsubstituted or methyl substituted, wholly aromaticcopolyester, polyether, or polyes
28、ter amide1 high temperatureDTULB260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 260C02 medium temperatureDTUL = 220260C03 general purposeDTUL 220C000 other 0 othe
29、r 0ADescription unspecified.BDTUL is deflection temperature under load measured at 1.8 MPa and is determined in accordance with Table A or Table B.D5138062NOTE 3Test specimens shall be prepared in accordance withISO 3167, Specimen Type 1A.NOTE 4A similar callout can be developed using Table B.4.2.1
30、Reinforced, filled, and lubricated variations of thebasic materials are 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 a
31、re shown in the following table:Symbol MaterialTolerance(Based on Total 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
32、, or both63 % for the totalAAsh content of filled, or reinforced material, or both, may be determined usingeither Test Method D 5630 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. Th
33、e typesand percentages of reinforcements and additives should be shown on thesuppliers 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.
34、2 Specific requirements shall be shown by a six-character designation. The designation will consist of the letterA 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
35、of properties available in existing materials, usersshould not infer that every possible combination of propertiesexists or 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 classificatio
36、n for a reinforced LCPmaterial is given as follows: The designation LCP0120G30A22450 wouldindicate the following material requirements:LCP = Liquid Crystal Polymer as found in Terminology D 160001 = Unsubstituted or methyl substituted, wholly aromatic copolyes-ter, polyether, or polyester amide (gro
37、up),2 = medium temperature (class)0 = unspecified (grade)G30 = Glass reinforced 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 =
38、 UnspecifiedTABLE A Property Requirements for Liquid Crystal Polymer Based on ISO Test Methods0 1234 5 67 8 91 Tensilestrength,min, MPaISO 527 unspecified 70 100 120 140 160 180 200 220 specifyvalue2 Flexuralmodulus,min, GPaISO 178 unspecified 4 8 12 16 20 24 28 32 specifyvalue3 Notchedizodimpact,mi
39、n, 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 specifyvalueADTUL = Deflection temperature under load tested flatwise on 80 by 10 by 4-mm specimen.TABLE B (Formerly Tab
40、le A in D 5138 90) Property Requirements for LCP Based on ASTM Test Methods0 12345678 9Tensile strength, MPa, min,A(D 638)unspecified 70 100 120 140 160 180 200 220 specify valueFlex modulus, GPa, min,B(D 790)unspecified 4 8 12 16 20 24 28 32 specify valueNotched Izodimpact, min,J/m, (D 256)Cunspeci
41、fied 40 75 100 125 150 200 300 400 specify valueDeflection temperature, min,C at 1.8 MPa, (D 648)unspecified 140 180 220 240 260 300 340 380 specify valueTo be determined unspecified specify valueAType 1 tensile bar, 3.2 mm thick tested at 5 mm/min 6 25 % (minimum length 200 mm).B127 by 12.7 by 3.2-
42、mm bar tested at 1.3 mm/min.CBar thickness 3.2 mm.D5138063If no properties are specified, the designation would beLCP0120G30A00000.5. Suffixes Requirements5.1 When additional requirements are needed that are notcovered by the basic requirements or cell-table requirements,they shall be indicated thro
43、ugh the use of suffixes.5.2 A list of suffixes can be found in Classification SystemD 4000 (Table 3) and may be used for additional requirementsas appropriate.5.2.1 Additional suffixes will be added to that standard astest methods and requirements are developed and requested.6. General Requirements6
44、.1 The composition of the specified material shall beuniform and shall conform to the requirements specifiedherein.6.2 The basic requirements from the property tables or celltables are always in effect unless superseded by specific suffixrequirements, which always take precedence.7. Detail Requireme
45、nts7.1 The material shall conform to the requirements pre-scribed in Tables LCPandA(or B), and the suffix requirementsas they apply.7.2 For the purposes of determining conformance with thisclassification system, all specified limits for a specification(line callout) based on this classification syst
46、em 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 be compared directlywith the limiting value. Conformance or nonconformance isbased on this comparison.8. Sampling8.1 Sampling shall be statistically adequa
47、te 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, and may consist of a blend oftwo or more production runs.9. Specimen Preparation9.1 The moisture content of the molding material for thepreparation of test specimens shal
48、l not exceed 0.01 %. Materialhaving a moisture content above these limits shall be dried inaccordance with the instructions of the manufacturer.9.2 The test specimens shall be prepared by an injectionmolding process as specified in ISO 294-1 for Table A orPractice D 3641 for Table B. The processing
49、conditions speci-fied in Table 4 are guidelines only. Since mechanical propertiescan vary depending on the molding conditions, 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 in PracticeD 3641 may be required to fill the part adequately. Whenreporting data in accordance with a specification (line callout)based on Table B, the gate design should be specified.10. Conditioning10.1 Test specim
