1、Designation: D2647 10Standard Specification forCrosslinkable Ethylene Plastics1This standard is issued under the fixed designation D2647; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parent
2、heses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers a general classification systemfor crosslinkable ethylene plastics compounds (Note 1). Therequirements specified herein are
3、not necessarily applicable foruse as criteria in determining suitability for the end use of afabricated product.NOTE 1It is to be noted that this specification describes materials thatare available commercially in their uncrosslinked form. Therefore, theyare crosslinkable compounds despite the fact
4、that measurement of theparameters used for their classification and specification will usually becarried out after curing has been effected.1.2 Two types of compounds are covered, namely, mechani-cal types in which mechanical strength properties are of primeimportance in applications, and electrical
5、 types in whichelectrical insulating or conducting properties also are of primeimportance in applications.1.3 The parameters used to classify and specify the me-chanical types are ultimate elongation, elongation retentionafter aging, apparent modulus of rigidity, and brittlenesstemperature.1.4 The p
6、arameters used to classify and specify the electri-cal types are ultimate elongation, elongation retention afteraging, apparent modulus of rigidity, brittleness temperature,dielectric constant, dissipation factor, and volume resistivity.1.5 The values stated in SI units are to be regarded as thestan
7、dard. The values given in parentheses are for informationonly.1.6 The following safety hazards caveat pertains only to thetest methods portion, Section 7, of this specification: Thisspecification does not purport to address all of the safetyconcerns, if any, associated with its use. It is the respon
8、sibilityof the user of this specification to establish appropriate safetyand health practices and determine the applicability of regu-latory limitations prior to use.NOTE 2There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2D150 Test Methods for AC Loss Chara
9、cteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insula-tionD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD573 Test Method for RubberDeterioration in an AirOvenD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties
10、of PlasticsD746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD883 Terminology Relating to PlasticsD991 Test Method for Rubber PropertyVolume Resistiv-ity Of Electrically Conductive and Antistatic ProductsD1043 Test Method for Stiffness Properties of Plastics as aFunctio
11、n of Temperature by Means of a Torsion TestD2765 Test Methods for Determination of Gel Content andSwell Ratio of Crosslinked Ethylene PlasticsD3892 Practice for Packaging/Packing of PlasticsIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units (SI): (The Modernized Metric System)2.2 M
12、ilitary Standard:MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes3(Obsolete 1995)3. Terminology3.1 Definitions: For definitions of plastics terms used in thisspecification, see Terminology D883.3.2 Abbreviations:Units, Symbols, and AbbreviationsForunits, symbols, and abbrevia
13、tions used in this specification seeIEEE/ASTM SI-10.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved April 1, 2010. Published May 2010. Originallyapproved in 1967.
14、 Last previous edition approved in 2005 as D2647 - 05A. DOI:10.1520/D2647-10.2For referenced ASTM standards, visit 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 ont
15、he ASTM website.3Available from DefenseAutomation and Production Service, Bldg. 4 Section D,700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
16、n, PA 19428-2959, United States.4. Classification4.1 Classification SystemTable 1 and Table 2 provide aclassification system for these compounds so that the relationsamong them can be delineated and those that are commerciallyavailable can be readily specified. It is not the intent to indicatethat a
17、ll the combinations of properties possible are representedby commercial products or that they are technically possible atthe present state of knowledge.4.2 TypesThis specification covers two general types ofcompounds: Type IMechanical types (Table 1), and TypeIIElectrical types (Table 2).4.3 GradesA
18、 grade is designated by first indicating thetype (I or II) followed by cell numbers for each property in theorder in which they are listed in the tables. Where there is nointerest in a property, a “0” is entered in place of a cell number.5. General Requirements5.1 The compound shall be in powder, pe
19、llet or granularform, as agreed upon between the seller and the purchaser.5.2 The compound, after crosslinking, shall conform to therequirements given in Table 1 or Table 2, whichever isapplicable, for the type and grade specified when tested inaccordance with the procedures given in Sections 6, 7,
20、and 8.6. Sampling6.1 Sampling shall be statistically adequate to satisfy therequirements of 9.4.6.2 A batch or lot shall be constituted as a unit of manufac-ture as prepared for shipment and can consist of a blend of twoor more “production runs.”7. Specimen Preparation7.1 Unless otherwise agreed upo
21、n between the seller and thepurchaser, the test specimens shall be formed and cured inaccordance with the compound manufacturers recommenda-tions.8. Test Methods8.1 ConditioningCondition the test specimen at 23 6 2C(73.4 6 3.6F) and 50 6 10 % relative humidity for not lessthan 40 h prior to test in
22、accordance with Procedure A ofPractice D618, for those tests where conditioning is requiredand in all cases of disagreement.8.2 Test ConditionsConduct tests in the standard labora-tory atmosphere of 23 6 2C (73.4 6 3.6F) and 50 6 10 %relative humidity, unless otherwise specified in the test meth-ods
23、 or in this specification.8.3 Ultimate ElongationTest Method D638, using threeType IV specimens tested at 500 mm/min (20.0 in./min). If anyabsolute value differs more than 620 % from the average, twoadditional samples shall be tested, making a total of fivespecimens. The average value for these spec
24、imens shall beused for the classification.8.4 Elongation Retention After Aging Age three or fivetest specimens, conforming to Type IV of Test Method D638,in accordance with the number evaluated in 8.3. Use acirculating air oven at either 121 6 2C (250 6 3.6F) or 1506 2C (302 6 3.6F) in accordance wi
25、th Test Method D573and ensure that the hot air circulates freely around eachspecimen for 7 days (168 h). After 7 days, recondition the testspecimens and measure the ultimate elongation in accordancewith 8.3. Average the results and designate as A. Calculate thepercentage elongation retention, as fol
26、lows:Elongation retention, % 5 A/I! 3 100 (1)where:I = original elongation from 8.3.8.5 Apparent Modulus of RigidityCondition and testspecimens in accordance with 8.1 and 8.2 and measure inaccordance with Test Method D1043.8.6 Brittleness TemperatureTest Method D746.8.7 Dielectric ConstantTest Metho
27、d D150 at 1000 Hz(cycles per second) and 23 6 1C (73.4 6 1.8F).8.8 Dissipation FactorTest Methods D150 at 1000 Hzand 23 6 1C (73.4 6 1.8F).8.9 Volume ResistivityTest Methods D257. For preciseevaluation of specimens below 106Vcm, use Test MethodD991 as an alternative.8.10 Degree of CrosslinkingTest M
28、ethods D2765, withMethod A to be used for referee tests.9. Inspection and Certification9.1 Inspection and certification of the material supplied withreference to a specification based on this classification systemshall be for conformance to the requirements specified herein.9.2 Lot acceptance inspec
29、tion shall be the basis on whichacceptance or rejection of the lot is made.TABLE 1 Type I, Mechanical Compound RequirementsDesignationOrder No.PropertyCell Limits01 2 3451 Ultimate elongation, % unspecified 2.50 3.50 6.00 8.007 Dissipation factor unspecified #0.001 0.001 0.005 0.01 0.18 Volume resis
30、tivity, Vcm unspecified $1015$1012$104104D2647 103SUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this specification since the last issue,D2647 - 05a, that may impact the use of this specification. (May 1, 2010)(1) Revised Note 2, 6.1, 8.1, 8.2, and 8.5 (2) Revised
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