1、Designation: D1430 10Standard Classification System forPolychlorotrifluoroethylene (PCTFE) Plastics1This standard is issued under the fixed designation D1430; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This classification system covers polychlorotrif
3、luoroet-hylene (PCTFE) plastics that consist of at least 90 % chlorot-rifluoroethylene and are suitable for extrusion and for com-pression and injection molding. The remaining 10 % shallinclude chemical modifications, such as co-monomers, but notcolorants, fillers, plasticizers, or mechanical blends
4、 with otherresins. This classification system does not cover recycledPCTFE materials.1.2 The physical and electrical properties of parts molded orextruded from PCTFE molding compounds vary with thecrystalline content obtained during processing and subsequentannealing. Accordingly, the numerical valu
5、es listed in Table 1apply only to the test specimens molded in accordance withSection 8. These values are not applicable as design criteria tosemi-finished and finished parts prepared and annealed underother conditions.1.3 The values stated in SI units as detailed in IEEE/ASTMSI-10 are to be regarde
6、d as the standard. The values given inparentheses are for information only.1.4 The following precautionary statement pertains only tothe test methods portion, Section 10, of this classificationsystem: This standard does not purport to address all of thesafety concerns, if any, associated with its us
7、e. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1Although this classification system and ISO 12086-1 (1995)and ISO 12086-2 (1995) differ in approach or detail, d
8、ata obtained usingeither are technically equivalent.2. Referenced Documents2.1 ASTM Standards:2D150 Test Methods for AC Loss Characteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insula-tionD618 Practice for Conditioning Plastics for TestingD621 Test Methods for Deformation of
9、Plastics UnderLoad3D792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating toPlasticsD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystalliza
10、tion of Polymers byDifferential Scanning CalorimetryD3892 Practice for Packaging/Packing of PlasticsD4591 Test Method for Determining Temperatures andHeats of Transitions of Fluoropolymers by DifferentialScanning CalorimetryD4895 Specification for Polytetrafluoroethylene (PTFE)Resin Produced From Di
11、spersionD7194 Specification for Aerospace Parts Machined fromPolychlorotrifluoroethylene (PCTFE)D7211 Specification for Parts Machined from Polychlorot-rifluoroethylene (PCTFE) and Intended for General Use2.2 ISO Standard:4ISO 12086-1 (1995) PlasticsFluoropolymer Dispersionsand Moulding and Extrusio
12、n Materials, Part 1ISO 12086-2 (1995) PlasticsFluoropolymer Dispersions1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials (Section D20.15.12).Current edition approved Nov. 1, 2010. Pu
13、blished January 2011. Originallyapproved in 1956. Last previous edition approved in 2008 as D1430 03(2008).DOI: 10.1520/D1430-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informati
14、on, refer to the standards Document Summary page onthe ASTM website.3Withdrawn4Available 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 of this standard.Copyright ASTM International
15、, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.and Moulding and Extrusion Materials, Part 23. Terminology3.1 DefinitionsDefinitions of terms used in this classifi-cation system shall be in accordance with Terminology D883.3.1.1 lot, none production run or unifo
16、rm blend of two ormore production runs. D48953.2 Definitions of Terms Specific to This Standard:3.2.1 preforming, na process to compress the materialunder pressure in a mold to form a preform.3.2.2 zero strength time (ZST ), ntime measured in accor-dance with Section 10 of this classification system
17、 to check therelative molecular weight of PCTFE material.3.3 Abbreviations:AbbreviationsAbbreviated terms are inaccordance with Terminology D1600.4. Classification4.1 PCTFE materials in powders and pellets are classifiedinto one group. The group is subdivided into classes based onchemical compositio
18、n. These classes are subdivided intogrades as shown in the Basic Property Table (Table 1).An example of this classification system is given as follows:Group 01 = PCTFEClass 1 = homopolymerGrade 2 = having properties per Table 1 (Grade 2)4.1.1 To facilitate incorporation of future material the“other”
19、 category for group (01), class (0), and grade (0) areshown in Table 1.5. General Requirements5.1 The molding or extrusion material shall be of uniformcomposition and so compounded as to conform to the require-ments of this classification system.6. Detail Requirements6.1 Test specimens prepared in a
20、ccordance with Section 9shall conform to the requirements prescribed for the particulartype and grade in Table 1.6.2 For finished PCTFE parts made from resin meetingGroup 01, Class 1, Grade 3 requirements, and intended foraerospace use, detail requirements given in SpecificationD7194 shall be follow
21、ed.6.3 For finished PCTFE parts made from resin Group 01,Class 1, Grade 0, 1, 2, or 3 requirements, and intended forgeneral use, detail requirements given in Specification D7211shall be followed.7. Sampling7.1 Sampling shall be statistically adequate to satisfy therequirements of 11.4.8. Number of T
22、ests8.1 One set of test specimens as prescribed in Section 9shall be considered sufficient for testing each batch. Theaverage result for the specimens tested shall conform to therequirements prescribed in this classification system.9. Specimen Preparation9.1 Test specimens shall be cut from compress
23、ion-moldedsheets 1.58 6 0.08 mm (0.062 6 0.003 in.) thick, preparedfrom the resins in the following manner:9.1.1 PreformingPowder resin shall be preformed prior tomolding in the following way: Place 30 6 0.5 g of resin intoa 57-mm (2.25-in.) diameter positive-pressure compressionmold and compress th
24、e material at room temperature into apreform having a density of 1.4 to 1.5 g/cm3.Apressure of 68.9MPa (10 000 psi) will satisfactorily accomplish the densifica-tion.TABLE 1 Requirements for PCTFE Molded Test SpecimensPropertiesGroup Class Description GradeSpecificGravity,A23/23CZeroStrengthTime, sB
25、DeformationUnderLoadC,DMeltingPoint,CEDielectric ConstantF, max Dissipation FactorG, maxKhz MHz KHz MHz01 1 homopolymer 1 2.10-2.15 100-199 10 210-220 2.70 2.50 0.030 0.0122 2.10-2.15 200-299 10 210-220 2.70 2.50 0.030 0.0123 2.10-2.15 300-450 10 210-220 2.70 2.50 0.030 0.01202 modifiedhomopolymer 1
26、 2.10-2.12 100-199 15 200-210 2.70 2.50 0.030 0.0122 2.10-2.12 200-299 15 200-210 2.70 2.50 0.030 0.01203 copolymer 1 2.08-2.10 100-199 20 190-200 2.70 2.50 0.035 0.0152 2.07-2.10 200-299 25 190-200 2.70 2.50 0.035 0.01500 otherASee 10.1.7.BSee 10.1.3.CSee 10.1.4.DMaximum at 1112 N (250 lbf), 24 h,
27、70C, %.ESee 10.1.5.FSee 10.1.6.GSee 10.1.6.D1430 1029.1.2 MoldingPelletized resin, granular resin, and pre-forms of powder resin shall be molded in the following way:Place the preform prepared in accordance with 9.1.1 or 30 60.5 g of pelletized or granular resin on a 0.63-mm (0.025-in.)thick chrome-
28、plated metal plate and cover with a similar plate.Place spacers, 1.91 6 0.03 mm (0.075 6 0.001 in.) thick,between the chrome-plated metal plates and far enough apartso that they do not interfere with the flow of the resin duringmolding. Place the plates, with spacers and resin in place,between the p
29、latens of the press, the platens having beenheated to a surface temperature of 265 6 5C. Close andcontinuously load the platens, following the rate of melting sothat the plates reach the stops within 3 min after closing thepress. Then apply sufficient pressure for 3 min more to mold asheet of the re
30、quired thickness. Immediately after completionof the pressing, relieve the load, remove the plates and plasticsheet together, and at once quench them in cold water (15 65C) for 5 min, supporting the sandwich in a vertical positionin the water. Then strip the 1.58 6 0.08-mm (0.062 60.003-in.) thick s
31、heet from the metal plates. This sheet will beapproximately 75 cm2. Cut specimens from the center sectionof each sheet, discarding any imperfectly molded edges.10. Test Methods10.1 The properties enumerated in this classification systemshall be determined in accordance with the following testmethods
32、:10.1.1 ConditioningFor those tests where conditioning isrequired, the molded test specimens shall be conditioned inaccordance with Procedure A of Practice D618.10.1.2 Test ConditionsTests shall be conducted in thestandard laboratory atmosphere of 23 6 2C (73.4 6 3.6F)and 50 6 5 % relative humidity
33、unless otherwise specified inthe test methods or in this classification system.10.1.3 Zero Strength Time (ZST)The zero strength timeof PCTFE plastics shall be determined in accordance with theprocedure described in the following paragraphs:10.1.3.1 Significance and UseControl of molecularweight of t
34、hese polymers is necessary because the fabricatingtemperatures are very high and close to the point of rapidthermal degradation. The test for zero strength time is wellsuited to this type of control, as it is rapid, simple, andadaptable to semiautomatic operation, and for specific PCTFEresins correl
35、ates with molecular weight.10.1.3.2 ApparatusCylindrical brass thermostat and ac-cessory equipment as specified in Annex A1.10.1.3.3 Test StripFrom the molded sheet prepared inaccordance with Section 9 cut two strips 50 mm (2 in.) long,4.8 mm (316 in.) wide, and 1.58 6 0.08 mm (0.062 6 0.003 in.)thi
36、ck, using the sample cutter. With the notching punch makea V-notch in both sides of the strips approximately at the centerline (equally distant from the ends of the 50-mm length) so thatthe notches are directly opposite each other. The cross-sectional width between the notches shall be 1.19 6 0.03 m
37、m(0.047 6 0.001 in.), and the sides of each notch shall form anangle of 90 6 0.5 with each other.Alternatively, cut and notchthe test strips in one operation with a test specimen punchmounted in an arbor press. Dimensions of the finished test stripare shown in Fig. A1.1.10.1.3.4 ProcedureInsert one
38、end of each notched stripinto a specimen holder (Fig. A1.1) and clip a weight of 7.5 60.1 g on the other end of the strip. The specimen holder andweight shall be at or near room temperature (23 6 10C).Insert the weighted specimens into the furnaces, which shall beat a temperature of 250 6 1C, and st
39、art the timers at themoment of insertion.As each specimen breaks and the attachedweight drops through the bottom of the furnace, stop thecorresponding timer. Record the time in seconds indicated oneach timer. Take the average of these two readings as the zerostrength time for the duplicate specimens
40、. If the differencebetween the two measurements exceeds 10 % of the average,reject these readings and test a second pair of specimens.10.1.3.5 Precision and BiasThe precision and bias datafor this test method is to be determined.10.1.4 Deformation Under LoadTest Method A of TestMethods D621. With 11
41、12-N (250-lbf) load at 70 6 1C,except that permissible deformations may exceed 25 %.NOTE 2Experimental data have shown that at 1112-N (250-lbf) loadand 70C, the test for deformation under load is applicable for the purposeof classification to the materials described in this specification beyond25 %
42、deformation.10.1.5 Melting PointThe melting point shall be deter-mined by differential scanning calorimetry (DSC) (see TestMethod D4591).10.1.5.1 For DSC measurements, the test procedure shallfollow that of the procedure section of Test Method D4591,with the exception that the reported melt temperat
43、ure is thatobtained upon reheating the sample after an initial melting andrecrystallization.10.1.6 Dissipation Factor and Dielectric ConstantTestMethods D150.NOTE 3A disk of approximately 50-mm (2-in.) diameter has beenfound satisfactory for the test.10.1.7 Specific GravityTest Method A of Test Meth
44、odsD792. The liquid used shall be n-heptane. The average of thespecificgravity of three test specimens shall be reported.11. Inspection and Certification11.1 Inspection and certification of the material suppliedwith reference to a specification based on this classificationsystem shall be for conform
45、ance to the requirements specifiedherein.11.2 Lot-acceptance shall be the basis on which acceptanceor rejection of the lot is made. The lot-acceptance inspectionshall consist of particle size determination.11.3 Periodic check inspection with reference to a specifi-cation based on this classification
46、 system shall consist of thetests for all requirements of the material under the specifica-tion. Inspection frequency shall be adequate to ensure thematerial is certifiable in accordance with 11.4.11.4 Certification shall be that the material was manufac-tured by a process in statistical control, sa
47、mpled, tested, andinspected in accordance with this classification system, andthat the average values for the lot meet the requirements of thespecification (line callout).11.5 A report of test results shall be furnished when re-quested. The report shall consist of results of the lot-acceptanceD1430
48、103inspection for the shipment and the results of the most recentperiodic-check inspection.12. Packaging and Package Marking12.1 The provisions of Practice D3892 apply to packaging,packing, and marking of containers for plastic materials.13. Keywords13.1 fluoropolymers; PCTFE; polychlorotrifluoroeth
49、ylene;zero strength timeANNEX(Mandatory Information)A1. APPARATUS FOR ZERO STRENGTH TIME TESTA1.1 Cylindrical Brass ThermostatA1.1.1 Acylindrical brass thermostat, Fig.A1.1, 127 mm (5in.) in length and 102 mm (4 in.) in diameter, containing twosmooth straight holes 19 mm (34 in.) in diameter for the testspecimens. The holes shall be bored parallel to the axis of thecylinder and shall have inside surfaces coated with a high-temperature black paint to provide a uniformly radiatingsurface. Two additional holes shall be provided: one, 6 mm (14F
