ASTM D1430-03(2008)
(Classification)Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ABSTRACT
This classification system covers polychlorotrifluoroethylene (PCTFE) plastics that consist of at least 90% chlorotrifluoroethylene and are suitable for extrusion and for compression and injection molding. The remaining 10% may include chemical modifications, such as co-monomers, but not colorants, fillers, plasticizers, or mechanical blends with other resins. PCTFE materials in powders and pellets are classified into one group. The group is subdivided into classes based on chemical composition: Class 1; Class 2; and Class 3. These classes are subdivided into grades: Grades 1, 2, 3, and 0; Grades 1, 2, and 0; and Grades 1, 2, and 0; respectively. The molding or extrusion material shall be of uniform composition and so compounded as to conform to the requirements of this classification system. The properties shall be determined in accordance with the following test methods: conditioning; zero strength time; test conditions; deformation under load; melting point; dissipation factor and dielectric constant; and specific gravity.
SCOPE
1.1 This classification system covers polychlorotrifluoroethylene (PCTFE) plastics that consist of at least 90 % chlorotrifluoroethylene and are suitable for extrusion and for compression and injection molding. The remaining 10 % may include chemical modifications, such as co-monomers, but not colorants, fillers, plasticizers, or mechanical blends with other resins. This classification system does not cover recycled PCTFE materials.
1.2 The physical and electrical properties of parts molded or extruded from PCTFE molding compounds vary with the crystalline content obtained during processing and subsequent annealing. Accordingly, the numerical values listed in Table 1 apply only to the test specimens molded in accordance with Section 8. These values may not be applicable as design criteria to parts prepared and annealed under other conditions.
1.3 The values stated in SI units as detailed in IEEE/ASTM SI 10 are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The following precautionary statement pertains only to the test methods portion, Section 10, of this classification system: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 1—Although this classification system and ISO 12086-1 (1995) and ISO 12086-2 (1995) differ in approach or detail, data obtained using either are technically equivalent.
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Designation: D1430 – 03 (Reapproved 2008)
Standard Classification System for
Polychlorotrifluoroethylene (PCTFE) Plastics
This standard is issued under the fixed designation D1430; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript 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* D150 Test Methods for AC Loss Characteristics and Per-
mittivity (Dielectric Constant) of Solid Electrical Insula-
1.1 This classification system covers polychlorotrifluoroet-
tion
hylene (PCTFE) plastics that consist of at least 90% chlorot-
D618 Practice for Conditioning Plastics for Testing
rifluoroethylene and are suitable for extrusion and for com-
D621 Test Methods for Deformation of Plastics Under
pression and injection molding. The remaining 10% may
Load
include chemical modifications, such as co-monomers, but not
D792 Test Methods for Density and Specific Gravity (Rela-
colorants, fillers, plasticizers, or mechanical blends with other
tive Density) of Plastics by Displacement
resins. This classification system does not cover recycled
D883 Terminology Relating to Plastics
PCTFE materials.
D1600 Terminology for Abbreviated Terms Relating to
1.2 Thephysicalandelectricalpropertiesofpartsmoldedor
Plastics
extruded from PCTFE molding compounds vary with the
D2117 Test Method for Melting Point of Semicrystalline
crystalline content obtained during processing and subsequent
Polymers by the Hot Stage Microscopy Method
annealing. Accordingly, the numerical values listed in Table 1
D3418 Test Method for Transition Temperatures and En-
apply only to the test specimens molded in accordance with
thalpies of Fusion and Crystallization of Polymers by
Section8.Thesevaluesmaynotbeapplicableasdesigncriteria
Differential Scanning Calorimetry
to parts prepared and annealed under other conditions.
D3892 Practice for Packaging/Packing of Plastics
1.3 The values stated in SI units as detailed in IEEE/ASTM
D4591 Test Method for Determining Temperatures and
SI 10 are to be regarded as the standard. The values given in
Heats of Transitions of Fluoropolymers by Differential
parentheses are for information only.
Scanning Calorimetry
1.4 The following precautionary statement pertains only to
2.2 ISO Standard:
the test methods portion, Section 10, of this classification
ISO12086-1 (1995) Plastics—Fluoropolymer Dispersions
system: This standard does not purport to address all of the
and Moulding and Extrusion Materials, Part 1
safety concerns, if any, associated with its use. It is the
ISO12086-2 (1995) Plastics—Fluoropolymer Dispersions
responsibility of the user of this standard to establish appro-
and Moulding and Extrusion Materials, Part 2
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Terminology
NOTE 1—Although this classification system and ISO12086-1 (1995)
3.1 Definitions—Definitions of terms used in this classifi-
and ISO12086-2 (1995) differ in approach or detail, data obtained using
cation system shall be in accordance with Terminology D883.
either are technically equivalent.
3.1.1 lot, n—one production run or uniform blend of two or
more production runs. D4895
2. Referenced Documents
3.2 Definitions of Terms Specific to This Standard:
2.1 ASTM Standards:
3.2.1 preforming, n—a process to compress the material
under pressure in a mold to form a preform.
ThisclassificationsystemisunderthejurisdictionofASTMCommitteeD20on
3.2.2 zero strength time (ZST ), n—time measured in accor-
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
dancewithSection10ofthisclassificationsystemtocheckthe
Materials (Section D20.15.12).
relative molecular weight of PCTFE material.
Current edition approved April 1, 2008. Published July 2008. Originally
approved in 1956. Last previous edition approved in 2003 as D1430–03. DOI:
10.1520/D1430-03R08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Withdrawn
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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.
D1430 – 03 (2008)
TABLE 1 Requirements for PCTFE Molded Test Specimens
Properties
F G
Specific Zero Deformation Melting
Dielectric Constant , max Dissipation Factor , max
A
Group Class Description Grade Gravity, Strength Under Point,
B C,D E
Khz MHz KHz MHz
23/23°C Time, s Load °C
01 1 homopolymer 1 2.10-2.15 100-199 10 210-220 2.70 2.50 0.030 0.012
2 2.10-2.15 200-299 10 210-220 2.70 2.50 0.030 0.012
3 2.10-2.15 300-450 10 210-220 2.70 2.50 0.030 0.012
2 modified
homopolymer 1 2.10-2.12 100-199 15 200-210 2.70 2.50 0.030 0.012
2 2.10-2.12 200-299 15 200-210 2.70 2.50 0.030 0.012
3 copolymer 1 2.08-2.10 100-199 20 190-200 2.70 2.50 0.035 0.015
2 2.07-2.10 200-299 25 190-200 2.70 2.50 0.035 0.015
0 other
A
See 10.1.7.
B
See 10.1.3.
C
See 10.1.4.
D
Maximum at 1112 N (250 lbf), 24 h, 70°C, %.
E
See 10.1.5.
F
See 10.1.6.
G
See 10.1.6.
3.3 Abbreviations:Abbreviations—Abbreviated terms are in average result for the specimens tested shall conform to the
accordance with Terminology D1600. requirements prescribed in this classification system.
9. Specimen Preparation
4. Classification
4.1 PCTFE materials in powders and pellets are classified 9.1 Test specimens shall be cut from compression-molded
sheets 1.58 6 0.08 mm (0.062 6 0.003 in.) thick, prepared
into one group. The group is subdivided into classes based on
chemical composition. These classes are subdivided into from the resins in the following manner:
9.1.1 Preforming—Powderresinshallbepreformedpriorto
grades as shown in the Basic Property Table (Table 1).
An example of this classification system is given as follows: molding in the following way: Place 30 6 0.5 g of resin into
a 57-mm (2.25-in.) diameter positive-pressure compression
Group 01 = PCTFE
Class 1 = homopolymer mold and compress the material at room temperature into a
preformhavingadensityof1.4to1.5g/cm .Apressureof68.9
Grade 2 = having properties per Table 1 (Grade 2)
4.1.1 To facilitate incorporation of future material the MPa (10 000 psi) will satisfactorily accomplish the densifica-
tion.
“other” category for group (01), class (0), and grade (0) are
shown in Table 1. 9.1.2 Molding—Pelletized resin, granular resin, and pre-
forms of powder resin shall be molded in the following way:
5. General Requirements
Place the preform prepared in accordance with 9.1.1 or 30 6
5.1 The molding or extrusion material shall be of uniform 0.5 g of pelletized or granular resin on a 0.63-mm (0.025-in.)
composition and so compounded as to conform to the require- thick chrome-plated metal plate and cover with a similar plate.
ments of this classification system. Place spacers, 1.91 6 0.03 mm (0.075 6 0.001 in.) thick,
between the chrome-plated metal plates and far enough apart
6. Detail Requirements
so that they do not interfere with the flow of the resin during
molding. Place the plates, with spacers and resin in place,
6.1 Test specimens prepared in accordance with Section 9
shall conform to the requirements prescribed for the particular between the platens of the press, the platens having been
heated to a surface temperature of 265 6 5°C. Close and
type and grade in Table 1.
continuously load the platens, following the rate of melting so
7. Sampling
that the plates reach the stops within 3 min after closing the
7.1 Sampling shall be statistically adequate to satisfy the press. Then apply sufficient pressure for 3 min more to mold a
requirements of 11.4. sheet of the required thickness. Immediately after completion
of the pressing, relieve the load, remove the plates and plastic
8. Number of Tests
sheet together, and at once quench them in cold water (15 6
8.1 One set of test specimens as prescribed in Section 9 5°C) for 5 min, supporting the sandwich in a vertical position
shall be considered sufficient for testing each batch. The in the water. Then strip the 1.58 6 0.08-mm (0.062 6
D1430 – 03 (2008)
NOTE 2—Experimental data have shown that at 1112-N (250-lbf) load
0.003-in.) thick sheet from the metal plates. This sheet will be
and70°C,thetestfordeformationunderloadisapplicableforthepurpose
approximately 75 cm . Cut specimens from the center section
of classification to the materials described in this specification beyond
of each sheet, discarding any imperfectly molded edges.
25% deformation.
10.1.5 Melting Point—The melting point shall be deter-
10. Test Methods
mined either by optical microscopy (see Test Method D2117)
10.1 The properties enumerated in this classification system
or differential scanning calorimetry (DSC) (see Test Method
shall be determined in accordance with the following test
D4591).Bothtestmethodsgiveequivalentmeltingpointsafter
methods:
each sample receives a similar cooling history from the melt.
10.1.1 Conditioning—For those tests where conditioning is
Since rapid cooling may give a poor birefringence signal (see
required, the molded test specimens shall be conditioned in
Note 3, Test Method D2117) and a broad, poorly defined melt
accordance with Procedure A of Practice D618.
temperature, a sufficiently slow cooling rate should be selected
10.1.2 Test Conditions—Tests shall be conducted in the
to give a sharp, well-defined melt temperature on reheating.
standard laboratory atmosphere of 23 6 2°C (73.4 6 3.6°F)
10.1.5.1 For optical microscopy (see Test Method D2117),
and 50 6 5% relative humidity unless otherwise specified in
the sample shall be a portion of the compression-molded sheet
the test methods or in this classification system.
prepared in accordance with the sampling section which has
10.1.3 Zero Strength Time (ZST)—The zero strength time
beenremoldedtoafilm0.01to0.04mm(0.4to1.6mils)thick
of PCTFE plastics shall be determined in acc
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D1430–00 Designation: D 1430 – 03 (Reapproved 2008)
Standard Classification System for
Polychlorotrifluoroethylene (PCTFE) Plastics
This standard is issued under the fixed designation D1430; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript 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 polychlorotrifluoroethylene (PCTFE) plastics that consist of at least 90% chlorotrifluo-
roethylene and are suitable for extrusion and for compression and injection molding. The remaining 10% may include chemical
modifications, such as co-monomers, but not colorants, fillers, plasticizers, or mechanical blends with other resins. This
classification system does not cover recycled PCTFE materials.
1.2 The physical and electrical properties of parts molded or extruded from PCTFE molding compounds vary with the
crystallinecontentobtainedduringprocessingandsubsequentannealing.Accordingly,thenumericalvalueslistedinTable1apply
only to the test specimens molded in accordance with Section 8. These values may not be applicable as design criteria to parts
prepared and annealed under other conditions.
1.3 The values stated in SI units as detailed in IEEE/ASTM SI 10 are to be regarded as the standard. The values given in
parentheses are for information only.
1.4 The following precautionary statement pertains only to the test methods portion, Section 10, of this classification system:
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the
user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations
prior to use.
NOTE 1—Although this classification system and ISO 12086-1 (1995) and ISO 12086-2 (1995) differ in approach or detail, data obtained using either
are technically equivalent.
2. Referenced Documents
2.1 ASTM Standards:
D150 Test Methods for A-CAC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulating
Insulation
D618Practice for Conditioning Plastics and Electrical Insulating Materials for Testing Practice for Conditioning Plastics for
Testing
D621 Test Methods for Deformation of Plastics Under Load
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D2117 Test Method for Melting Point of Semicrystalline Polymers by the Hot Stage Microscopy Method
D3418Test Method for Transition Temperatures of Polymers by Thermal Analysis 3418 Test Method for Transition
Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry
D3892 Practice for Packaging/Packing of Plastics
D4591 Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning
Calorimetry
2.2 ISO Standard:
ISO12086-1 (1995) Plastics—Fluoropolymer Dispersions and Moulding and Extrusion Materials, Part 1
This classification system is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials (Section D20.15.12).
Current edition approved Nov. 10, 2000. Published January 2001. Originally published as D1430–56T. Last previous edition D1430–95.
Current edition approved April 1, 2008. Published July 2008. Originally approved in 1956. Last previous edition approved in 2003 as D1430–03.
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 10.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
Withdrawn
These test methods were withdrawn with no replacement in 1994. Test Methods D621 can be obtained from Global Engineering Documents, 15 Inverness Way East,
Englewood, CO 80112.
*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.
D 1430 – 03 (2008)
TABLE 1 Requirements for PCTFE Molded Test Specimens
Properties
F G
Specific Zero Deformation Melting
Dielectric Constant , max Dissipation Factor , max
A
Group Class Description Grade Gravity, Strength Under Point,
B C,D E
Khz MHz KHz MHz
23/23°C Time, s Load °C
01 1 homopolymer 1 2.10-2.12 100-199 10 210-220 2.70 2.50 0.030 0.012
01 1 homopolymer 1 2.10-2.15 100-199 10 210-220 2.70 2.50 0.030 0.012
powder 2 2.10-2.12 200-299 10 210-220 2.70 2.50 0.030 0.012
2 2.10-2.15 200-299 10 210-220 2.70 2.50 0.030 0.012
3 2.10-2.12 300-450 10 210-220 2.70 2.50 0.030 0.012
3 2.10-2.15 300-450 10 210-220 2.70 2.50 0.030 0.012
02 2 modified
2 modified
pellet homopolymer 1 2.10-2.12 100-199 15 200-210 2.70 2.50 0.030 0.012
homopolymer 1 2.10-2.12 100-199 15 200-210 2.70 2.50 0.030 0.012
2 2.10-2.12 200-299 15 200-210 2.70 2.50 0.030 0.012
3 copolymer 1 2.08-2.10 100-199 20 190-200 2.70 2.50 0.035 0.015
2 2.07-2.10 200-299 25 190-200 2.70 2.50 0.035 0.015
00 0 other
Other
0 other
A
See 10.1.7.
B
See 10.1.3.
C
See 10.1.4.
D
Maximum at 1112 N (250 lbf), 24 h, 70°C, %.
E
See 10.1.5.
F
See 10.1.6.
G
See 10.1.6.
ISO12086-2 (1995) Plastics—Fluoropolymer Dispersions and Moulding and Extrusion Materials, Part 2
3. Terminology
3.1 Definitions—Definitions of terms used in this classification system shall be in accordance with Terminology D883.
3.1.1 lot, n—one production run or uniform blend of two or more production runs. D 4895
3.2 Definitions of Terms Specific to This Standard:
3.2.1 preforming, n—a process to compress the material under pressure in a mold to form a preform.
3.2.2 zero strength time (ZST ), n—time measured according to Section —time measured in accordance with Section 10 of this
classification system to check the relative molecular weight of PCTFE material.
3.3 Abbreviations:Abbreviations—Abbreviated terms are in accordance with Terminology D1600.
4. Classification
4.1The PCTFE 4.1 PCTFE materials are classified into groups in accordance with their physical appearance. in powders and
pellets are classified into one group.The groups are furthergroup is subdivided into classes based on chemical composition.These
classes are subdivided into grades as shown in the Basic Property Table (Table 1).
An example of this classification system is given as follows:
Group 01 = powderPCTFE
Class 1 = homopolymer
Grade 2 = having properties in accordance withper Table 1 (Grade 2)
4.1.1 To facilitate incorporation of future material the “other” category for group (00),(01), class (0), and grade (0) are shown
in Table 1.
5. General Requirements
5.1 The molding or extrusion material shall be of uniform composition and so compounded as to conform to the requirements
of this classification system.
6. Detail Requirements
6.1 Test specimens prepared in accordance with Section 9 shall conform to the requirements prescribed for the particular type
and grade in Table 1.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
D 1430 – 03 (2008)
7. Sampling
7.1 Sampling shall be statistically adequate to satisfy the requirements of 11.4.
8. Number of Tests
8.1 One set of test specimens as prescribed in Section 9 shall be considered sufficient for testing each batch.The average result
for the specimens tested shall conform to the requirements prescribed in this classification system.
9. Specimen Preparation
9.1 Test specimens shall be cut from compression-molded sheets 1.58 6 0.08 mm (0.062 6 0.003 in.) thick, prepared from the
resins in the following manner:
9.1.1 Preforming—Powder resin shall be preformed prior to molding in the following way: Place 30 6 0.5 g of resin into a
57-mm (2.25-in.) diameter positive-pressure compression mold and compress the material at room temperature into a preform
having a density of 1.4 to 1.5 g/cm . A pressure of 68.9 MPa (10 000 psi) will satisfactorily accomplish the densification.
9.1.2 Molding—Pelletized resin, granular resin, and preforms of powder resin shall be molded in the following way: Place the
preform prepared in accordance with 9.1.1 or 30 6 0.5 g of pelletized or granular resin on a 0.63-mm (0.025-in.) thick
chrome-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 apart so that they do not interfere with the flow of the resin during molding. Place the
plates, with spacers and resin in place, between the platens of the press, the platens having been heated to a surface temperature
of 265 6 5°C. Close and continuously load the platens, following the rate of melting so that the plates reach the stops within 3
min after closing the press. Then apply sufficient pressure for 3 min more to mold a sheet of the required thickness. Immediately
after completion of the pressing, relieve the load, remove the plates and plastic sheet together, and at once quench them in cold
water (15 6 5°C) for 5 min, supporting the sandwich in a vertical position in the water. Then strip the 1.58 6 0.08-mm (0.062
6 0.003-in.) thick sheet from the metal plates. This sheet will be approximately 75 cm . Cut specimens from the center section
of each sheet, discarding any imperfectly molded edges.
10. Test Methods
10.1 Thepropertiesenumeratedinthisclassificationsystemshallbedeterminedinaccordancewiththefollowingtestmethods:
10.1.1 Conditioning—For those tests where conditioning is required, the molded test specimens shall be conditioned in
accordance with Procedure A of Practice D618.
10.1.2 Test Conditions—Tests shall be conducted in the standard laboratory atmosphere of 23 6 2°C (73.4 6 3.6°F) and 50 6
5% relative humidity unless otherwise specified in the test methods or in this classification system.
10.1.3 Zero Strength Time (ZST)—The zero strength time of PCTFE plastics shall be determined in accordance with the
procedure described in the following paragraphs:
10.1.3.1 Significance and Use—Control of molecular weight of these polymers is necessary because the fabricating
temperatures are very high and close to the point of rapid thermal degradation.The test for zero strength time is well suited to this
type of control, as it is rapid, simple, and adaptable to semiautomatic operation, and for specific PCTFE resins correlates with
molecular weight.
10.1.3.2 Apparatus—Cylindrical brass thermostat and accessory equipment as specified in Annex A1.
10.1.3.3 Test Strip—From the molded sheet prepared in accordance with Section 9 cut two strips 50 mm (2 in.) long, 4.8 mm
( ⁄16 in.) wide, and 1.58 6 0.08 mm (0.062 6 0.003 in.) thick, using the sample cutter. With the notching punch make a V-notch
in both sides of the strips approximately at the center line (equally distant from the ends of the 50-mm length) so that the notches
are directly opposite each other.The cross-sectional width between the notches shall be 1.19 6 0.03 mm (0.047 6 0.001 in.), and
thesidesofeachnotchshallformanangleof90 60.5°witheachother.Alternatively,cutandnotchtheteststripsinoneoperation
with a test specimen punch mounted in an arbor press. Dimensions of the finished test strip are shown in Fig. A1.1.
10.1.3.4 Procedure—Insert one end of each notched strip into a specimen holder (Fig.A1.1) and clip a weight of 7.5 6 0.1 g
ontheotherendofthestrip.Thespecimenholderandweightshallbeatornearroomtemperature(23 610°C).Inserttheweighted
specimensintothefurnaces,whichshallbeatatemperatureof250 61°C,andstartthetimersatthemomentofinsertion.Aseach
specimen breaks and the attached weight drops through the bottom of the furnace, stop the corresponding timer. Record the time
in seconds indicated on each timer. Take the average of these two readings as the zero strength time for the duplicate specimens.
If the difference between the two measurements exceeds 10% of the average, reject these readings and test a second pair of
specimens.
10.1.3.5 Precision and Bias—The precision and bias data for this test method is to be determined.
10.1.4 Deformation Under Load—Test MethodAofTest Methods D621.With 1112-N (250-lbf) load at 70 6 1°C, except that
permissible deformations may exceed 25%.
NOTE 2—Experimental data have shown that at 1112-N (250-lbf) load and 70°C, the test for deformation under load is applicable for the purpose of
classification to the materials described in this specification beyond 25% deformation.
10.1.5 Melting Point—The melting point shall be determined either by optical microscopy (see Test Method D2117) or
differential scanning calorimetry (DSC) (see Test Method D4591). Both test methods give equivalent melting points after each
D 1430 – 03 (2008)
samplereceivesasimilarcoolinghistoryfromthemelt.Sincerapidcoolingmaygiveapoorbirefringencesignal(seeNote3,Test
Method D2117) and a broad, poorly defined melt temperature, a sufficiently slow cooling rate should be selected to give a sharp,
well-defined melt temperature on reheating.
10.1.5.1 For optical microscopy (see Test Method D2117), the sample shall be a portion of the compression-molded sheet
prepared in accordance with the sampling section which has been remolded to a film 0.01 to 0.04 mm (0.4 to 1.6 mils) thick
between the chrome-plated metal plates in a press with platens heated to a surface temperature of 265 6 5°C.
10.1.5.2 For DSC measurements, the test procedure shall follow that of the procedure section ofTest Method D4591, with the
exceptionthatthereportedmelttemperatureisthatobtaineduponreheatingthesampleafteraninitialmeltingandrecrystallization.
Since rapid cooling may give a broad, poorly defined melt temperature, a sufficiently slow cooling rate should be selected to give
a sharp, well-defined temperature on reheating.
10.1.6 Dissipation Factor and Dielectric Constant—Test Methods D150.
NOTE 3—A disk of approximately 50-mm (2-in.) diameter has been found satisfactory for the test.
10.1.7 Specific Gravity—Test Method A of Test Methods D792. The liquid used shall be
...
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