1、Designation: D 2647 05aStandard Specification forCrosslinkable Ethylene Plastics1This standard is issued under the fixed designation D 2647; 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 par
2、entheses indicates the year of last reapproval. Asuperscript epsilon (e) 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
3、are 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 f
4、act 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 electr
5、ical 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 T
6、he parameters 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 the
7、standard. The values given in brackets are for information only.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 resp
8、onsibilityof 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 similar or equivalent ISO standard.2. Referenced Documents2.1 ASTM Standards:2D 150 Test Methods for A-C Loss Char
9、acteristics andPermittivity (Dielectric Constant) of Solid Electrical Insu-lationD 257 Test Methods for D-C Resistance or Conductance ofInsulating MaterialsD 573 Test Method for RubberDeterioration in an AirOvenD 618 Practice for Conditioning Plastics for TestingD 638 Test Method for Tensile Propert
10、ies of PlasticsD 746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD 883 Terminology Relating to PlasticsD 991 Test Method for Rubber PropertyVolume Resistiv-ity of Electrically Conductive and Antistatic ProductsD 1043 Test Method for Stiffness Properties of Plastics as
11、aFunction of Temperature by Means of a Torsion TestD 1898 Practice for Sampling of Plastics3D 2765 Test Methods for Determination of Gel Content andSwell Ratio of Crosslinked Ethylene PlasticsD 3892 Practice for Packaging/Packing of PlasticsIEEE/ASTM SI-10 Standard for Use of the InternationalSystem
12、 of Units (SI): (The Modernized Metric System)2.2 Military Standard:MIL-STD-105 Sampling Procedures and Tables for Inspec-tion by Attributes4(Obsolete 1995)3. Terminology3.1 Definitions: For definitions of plastics terms used in thisspecification, see Terminology D 883.1This specification is under t
13、he jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved July 1, 2005. Published July 2005. Originally approvedin 1967. Last previous edition approved in 2005 as D 2647 - 05.2For referenced ASTM standa
14、rds, 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 onthe ASTM website.3Withdrawn.4Available from DefenseAutomation and Production Service, Bldg. 4 Section D,7
15、00 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 Conshohocken, PA 19428-2959, United States.3.2 Abbreviations:Units, Symbols, and AbbreviationsForunits,
16、symbols, and abbreviations used in this specification seeIEEE/ASTM SI-10.4. 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 specifie
17、d. It is not the intent to indicatethat all 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 Typ
18、eIIElectrical types (Table 2).4.3 GradesA 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 Requiremen
19、ts5.1 The compound shall be in powder, pellet 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 wit
20、h the procedures given in Sections 6, 7, and 8.6. Sampling6.1 Unless otherwise agreed between the seller and thepurchaser, the material shall be sampled in accordance with thegeneral and specific sampling procedures of Practice D 1898.Adequate statistical sampling prior to packaging shall beconsider
21、ed an acceptable alternative.7. Specimen Preparation7.1 Unless otherwise agreed upon 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 2C73
22、.4 6 3.6F and 50 6 5 % relative humidity for not lessthan 40 h prior to test in accordance with Procedure A ofPractice D 618, 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
23、and 50 6 5%relative humidity, unless otherwise specified in the test meth-ods or in this specification.8.3 Ultimate ElongationTest Method D 638, 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
24、be tested, making a total of fivespecimens. The average value for these specimens shall beused for the classification.8.4 Elongation Retention After Aging Age three or fivetest specimens, conforming to Type IV of Test Method D 638,in accordance with the number evaluated in 8.3. Use acirculating air
25、oven at either 121 6 2C 250 6 3.6F or 1506 2C 302 6 3.6F in accordance with Test Method D 573and 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 result
26、s and designate as A. Calculate thepercentage elongation retention, as follows: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 Sections 8 and 8.2 and measurein accordance with Test Method D
27、1043.8.6 Brittleness TemperatureTest Method D 746.8.7 Dielectric ConstantTest Method D 150, at 1000 Hz(cycles per second) and 23 6 1C 73.4 6 1.8F.8.8 Dissipation FactorTest Methods D 150 at 1000 Hzand 23 6 1C 73.4 6 1.8F.8.9 Volume ResistivityTest Methods D 257. For preciseevaluation of specimens be
28、low 106Vcm, use Test MethodD 991 as an alternative.8.10 Degree of CrosslinkingTest Methods D 2765, withMethod A to be used for referee tests.9. Inspection9.1 Inspection of the materials shall be agreed upon betweenthe purchaser and the supplier as part of the purchase contract.TABLE 1 Type I, Mechan
29、ical 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 resistivity, Vcm unspecified $1015$1012$104104D 2647 05a3ASTM International takes no position respecti
30、ng the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This stand
31、ard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Internation
32、al Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.T
33、his standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 2647 05a4
