ASTM D6339-11(2019)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D6339 −11 (Reapproved 2019)
Standard Classification System for and Basis for Specifications
for
Syndiotactic Polystyrene Molding and Extrusion (SPS)
This standard is issued under the fixed designation D6339; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Impact Resistance of Plastics
D618 Practice for Conditioning Plastics for Testing
1.1 This classification system covers syndiotactic polysty-
D638 Test Method for Tensile Properties of Plastics
rene materials including homopolymer, copolymers, blends,
D648 Test Method for Deflection Temperature of Plastics
and impact modified, suitable for molding and extrusion.
Under Flexural Load in the Edgewise Position
Recycled product will be addressed in a separate standard.
D790 Test Methods for Flexural Properties of Unreinforced
1.2 This classification system and subsequent line callout
and Reinforced Plastics and Electrical Insulating Materi-
(specification) are intended to provide a means of calling out
als
plastic materials used in fabrication of end use items or parts.
D792 Test Methods for Density and Specific Gravity (Rela-
It is not intended for the selection of matierials. Material
tive Density) of Plastics by Displacement
selection can be made by those having expertise in the plastics
D883 Terminology Relating to Plastics
field only after careful consideration of the design and the
D1238 Test Method for Melt Flow Rates of Thermoplastics
performance required of the part, the environment to which it
by Extrusion Plastometer
will be exposed, the fabrication process to be employed, the
D1525 Test Method for Vicat Softening Temperature of
inherent properties of the material other than those covered by
Plastics
this classification system, and the economics.
D1600 Terminology forAbbreviatedTerms Relating to Plas-
1.3 The properties included in this classification system are
tics
those required to identify the compositions covered. Other
D3641 Practice for Injection Molding Test Specimens of
requirements necessary to identify particular characteristics
Thermoplastic Molding and Extrusion Materials
important to specialized applications are to be called out using
D3892 Practice for Packaging/Packing of Plastics
the suffixes given in Section 5.
D4000 Classification System for Specifying Plastic Materi-
NOTE 1—There is no known ISO equivalent to this standard.
als
D5630 Test Method for Ash Content in Plastics
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- E29 Practice for Using Significant Digits in Test Data to
ization established in the Decision on Principles for the Determine Conformance with Specifications
Development of International Standards, Guides and Recom- 3
2.2 Military Standard:
mendations issued by the World Trade Organization Technical
MIL-STD-105 Sampling Procedure and Tables for Inspec-
Barriers to Trade (TBT) Committee.
tion by Attributes
2.3 ISO Standards:
2. Referenced Documents
ISO 75–1 and 2 Plastics: Determination of Temperature of
2.1 ASTM Standards:
Deflection Under Load
D256 Test Methods for Determining the Izod Pendulum
ISO 179–1 Determination of Charpy Impact Strength—Part
1: Non-Instrumented Impact Test
ISO 306 Plastics: Thermoplastic Materials-Determination of
ThisclassificationsystemisunderthejurisdictionofASTMCommitteeD20on
Vicat Softening Temperature (VST)
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
Current edition approved April 1, 2019. Published May 2019. Originally
approved in 1998. Last previous edition approved in 2011 as D6339 – 11. DOI:
10.1520/D6339-11R19. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM dodssp.daps.dla.mil.
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
D6339−11 (2019)
where:
ISO 527–2 Plastics: Determination of Tensile Properties-
0110 = Homopolymer, Table SPS,
Part 2: Test Conditions for Moulding and Extrusion
G15 = Glass-reinforced at 15 % nominal (see 4.2.1),
Plastics
A = Table A for property requirements,
ISO 1133 Plastics—Determination of the Melt Mass-Flow
1 = Tensile strength 50 MPa,
Rate (MFR) and the Melt Volume-Flow Rate (MVR) of
2 = Flexural modulus or tensile modulus (ISO), 4000 MPa/min,
Thermoplastics
3 = Izod impact 70 J/m or 7 kJ/m (Charpy ISO), minimum,
ISO 1183-1 Plastics: Methods for Determining the Density 3 = Deflection temperature, 180°C, minimum, and
2 = Specific gravity, 1.2, minimum.
of Non-Cellular Plastics—Part 1: Immersion Method,
If no properties are specified, the designation would be
Liquid Pyknometer Method and Titration Method
SPS0110G15A00000.
ISO 3451-1 Plastics: Determination of Ash-Part 1 General
4.3 Table B has been incorporated into this classification
Methods
system to facilitate the classification of special materials where
3. Terminology
neither Table SPS nor Table A reflect the required properties.
3.1 Definitions—The terminology used in this classification Table B shall be used in the same manner as Table A.
system is in accordance with Terminologies D883 and D1600.
NOTE 6—An example of a special material using this classification
system is as follows: The following designation would indicate material
4. Classification
requirements from Table B as:
4.1 Syndiotactic polystyrene materials are classified into SPS0110B76013
groups according to their composition. These groups are
where:
subdivided into classes and grades as shown in the basic
0110 = homopolymer from Table SPS,
propertiestable,TableSPS.Injectionmoldedpropertiesarethe
B = Cell Table B for properties requirements,
preferred standard and are used for the basis of call out 7 = Tensile strength, 70 MPa, minimum,
6 = Tensile Modulus, 3500 MPa, minimum,
examples. Call outs are allowed to be made in eitherASTM or
0 = Unspecified Izod impact/ISO Charpy impact,
ISO properties where both are given using the same line
1 = Vicat softening temperature, 80°C, minimum, and
callout.
3 = Flow rate, 3.0, minimum.
NOTE2—AnexampleofthisclassificationsystemforSPSisasfollows:
For SPS0111, the designation SPS would indicate SPS = syndiotactic
5. Suffix Requirements
polystyrene, 01= homopolymer, 1 = general purpose, and 1 (grade) =
5.1 When additional requirements are needed that are not
minimum grade requirements as found in Table SPS.
covered by the basic requirements or cell table requirements
4.1.1 To facilitate the incorporation of future or special
they shall be indicated through the use of suffixes.
materialsthe“Other/Unspecified”category(0)forgroup,class,
5.2 A list of suffixes can be found in Classification System
and grade is shown in Table SPS. The basic properties can be
D4000 (Table 3) and are to be used for additional requirements
obtained from Tables A or B as they apply (see 4.3).
as appropriate. Additional suffixes will be added to that
4.2 Reinforced and filled syndiotactic polystyrene materials
standard as test methods and requirments are developed and
are classified in accordance with Table SPS as noted or with
requested.
Table A.
NOTE 7—Properties of pigmented or colored SPS materials can differ
4.2.1 Reinforced and Additive Materials—A single letter
from the properties of natural or unpigmented SPS material, depending on
will be used for the major reinforcement or combination, or
the choice of colorants and the concentration. The main property affected
is ductility, as illustrated by a reduction in Izod impact strength. If specific
both, along with two digits that indicate the percentage of
propertiesofpigmentedSPSmaterialsarenecessary,priortestingbetween
addition by mass with the tolerances as shown in Table 1.
the materials supplier and end user should be initiated.
NOTE 3—This part of the system uses the type and percentages of
additive to designate the modification of the basic material. Percentage of
6. Basic Requirements
additives can be shown on the supplier’s Technical Data Sheet unless it is
6.1 Basic requirements from Table SPS, as they apply, are
proprietary. If necessary, additional requirements shall be indicated by the
always in effect unless superseded by specific suffix
use of the suffix part of the system, as given in Section 5.
NOTE 4—Determine ash content of filled or reinforced materials using
requirements, which always take precedence.
Test Method D5630 or ISO 3451–1 where applicable.
6.2 The plastics composition shall be uniform and shall
4.2.2 Table A, Detail Requirements—An identifying number
conform to the requirements specified herein.
is made up of the letter A and five digits comprising the cell
numbers for the new requirements in the designated order as
7. General Requirements
they appear in Table A.
7.1 The material composition shall conform to the require-
4.2.2.1 Although the values listed are necessary to include
ments in Tables SPS. A, B, and suffix requirements as they
the range of properties available in existing materials, not
apply.
every possible combination of the properties exists or can be
obtained.
8. D
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