ASTM D4549-00
(Specification)Standard Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS)
Standard Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS)
SCOPE
1.1 This specification covers polystyrene materials, both crystal and rubber modified, suitable for molding and extrusion. Recycled polystyrene products are addressed in Specification D5676.
1.2 This specification is intended to be a means of calling out plastic materials used in the fabrication of end items or parts. Material selection should be made by those having expertise in the plastics field after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the inherent properties of the material other than those covered by this specification, and the economics.
1.3 The properties included in this specification are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications can be called out using the suffixes as given in Section 5.
Note 1--This standard combines elements from ISO 1622-1-2 and ISO 2897-1-2, but is not equivalent to either ISO standard.
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: D 4549 – 00
Standard Specification for
Polystyrene and Rubber-Modified Polystyrene Molding and
Extrusion Materials (PS)
This standard is issued under the fixed designation D 4549; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 1525 Test Method for Vicat Softening Temperature of
Plastics
1.1 This specification covers polystyrene materials, both
D 1600 Terminology for Abbreviated Terms Relating to
crystal and rubber modified, suitable for molding and extru-
Plastics
sion. Recycled polystyrene products are addressed in Specifi-
D 2584 Test Method for Ignition Loss of Cured Reinforced
cation D 5676.
Resins
1.2 This specification is intended to be a means of calling
D 3892 Practice for Packaging/Packing of Plastics
out plastic materials used in the fabrication of end items or
D 4000 Classification System for Specifying Plastic Mate-
parts. Material selection should be made by those having
rials
expertise in the plastics field after careful consideration of the
D 5676 Specification for Recycled Polystyrene Molding
design and the performance required of the part, the environ-
and Extrusion Materials
ment to which it will be exposed, the fabrication process to be
E 105 Practice for Probability Sampling of Materials
employed, the inherent properties of the material other than
2.2 ISO Standards:
those covered by this specification, and the economics.
ISO 1622-1-2 Polystyrene (PS) Molding and Extrusion Ma-
1.3 The properties included in this specification are those
terials
required to identify the compositions covered. Other require-
ISO 2897-1-2 Impact Resistant Polystyrene (PS-I) Molding
ments necessary to identify particular characteristics important
and Extrusion Materials
to specialized applications can be called out using the suffixes
as given in Section 5.
3. Terminology
NOTE 1—This standard combines elements from ISO 1622-1-2 and ISO
3.1 Definitions — For definitions of technical terms pertain-
2897-1-2, but is not equivalent to either ISO standard.
ing to plastics used in this specification, see Terminology
D 883.
2. Referenced Documents
2.1 ASTM Standards:
4. Classification
D 256 Test Methods for Determining the Izod Pendulum
4.1 Polystyrene materials are classified into groups accord-
Impact Resistance of Plastics
ing to classes and grades as shown in the basic property table
D 618 Practice for Conditioning Plastics for Testing
(Table PS). Injection molded properties are the preferred
D 638 Test Method for Tensile Properties of Plastics
standard and are used for the basis of call out examples.
D 648 Test Method for Deflection Temperature of Plastics
NOTE 2—Since compression molded properties have been removed
Under Flexural Load in the Edgewise Position
from the standard with this publication, refer to previous publications of
D 790 Test Methods for Flexural Properties of Unreinforced
this standard, if interested in these properties.
and Reinforced Plastics and Electrical Insulating Materi-
NOTE 3—An example of this classification system for PS0111 is as
als
follows: The designation PS0111 would indicate: PS = polystyrene as
D 792 Test Methods for Density and Specific Gravity (Rela-
found in Terminology D 1600, 01 (group) = crystal polystyrene, 1 (class)
tive Density) of Plastics by Displacement
= general-purpose, and 1 (grade) = minimum-grade requirements as found
D 883 Terminology Relating to Plastics in Table PS.
D 1238 Test Method for Melt Flow Rates of Thermoplastics
4.1.1 To facilitate the incorporation of future or special
by Extrusion Plastometer
materials, the “other/unspecified” category (0) for group, class,
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Annual Book of ASTM Standards, Vol 08.02.
Materials. Annual Book of ASTM Standards, Vol 08.03.
Current edition approved Nov. 10, 2000. Published February 2001. Originally Annual Book of ASTM Standards, Vol 14.02.
published as D 4549 – 85. Last previous edition D 4549 – 98. Available from American National Standards Institute, 11 W. 42nd St., 13th
Annual Book of ASTM Standards, Vol 08.01. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 4549
and grade is shown in Table PS. The basic properties can be 4.2.2.1 Although the values listed are necessary to include
obtained from Tables A or B as they apply (see 4.3).
the range of properties available in existing materials, users
4.2 Reinforced and filled polystyrene materials are classi-
should not infer that every possible combination of the
fied in accordance with Table PS and Table A. Table PS
properties exists or can be obtained.
specifies unreinforced material and Table A the properties after
NOTE 6—An example of a reinforced polystyrene of this classification
addition of reinforcements or lubricants at the normal levels
system is as follows: The designation PS0110G15A12332 would indicate
indicated (see 4.2.1).
the following material requirements from Table A:
4.2.1 Reinforcements and Additive Materials—A single let-
0110 = Polystyrene, crystal, from Table PS,
ter will be used for the major reinforcement or combination, or
G15 = Glass-reinforced at 15 % nominal (see 4.2.1),
both, along with two digits that indicate the percentage of
A = Table A for property requirements,
1 = Tensile strength, 50 MPa, min,
addition by mass with the tolerances tabulated as follows:
2 = Flexural modulus, 4200 MPa, min,
Symbol Material Tolerance
3 = Izod impact, 40 J/m, min,
(Based on Total Mass)
3 = Deflection temperature, 102°C, min, and
2 = Specific gravity, 1.2, min.
C Carbon and graphite fiber-rein- 6 2%
If no properties are specified, the designation would be PS0110G15-A00000.
forced
G Glass 6 2%
M Mineral-reinforced 6 2%
L Lubricants Depends upon material
4.3 Table B has been incorporated into this specification to
and process to be
facilitate the classification of special materials where Table PS
specified
R Combination of reinforcement 6 2%
or Table A does not reflect the required properties. Tables shall
or fillers, or both
be used in the same manner as Table A.
NOTE 7—An example of a special material using this classification
NOTE 4—This part of the system uses the type and percentages of
system is as follows: The designation PS0110B76013 would indicate the
additive to designate the modification of the basic material. Percentage of
following, with the material requirements from Table B:
additives can be shown on the supplier’s Technical Data Sheet unless it is
PS0110 = Polystyrene, crystal, from Table PS,
proprietary. If necessary, additional requirements shall be indicated by the
B = Cell Table B for property requirements,
use of the suffix part of the system, as given in Section 5.
7 = Tensile strength, 70 MPa, min,
6 = Tensile modulus, 2700 MPa, min,
NOTE 5—Ash content of filled or reinforced materials may be deter-
0 = Unspecified Izod impact
mined using Test Method D 2584 where applicable.
I = Vicat softening temperature, 85°C, min, and
3 = Flow rate, 3.0, min.
4.2.2 Table A, Detail Requirements—An identifying num-
ber is made up of the letter A and five digits comprising the cell
numbers for the new requirements in the designated order as
they appear in Table A.
TABLE PS Polystyrene Materials, Detail Requirements, Natural Color Only
Melt Flow Rate, Vicat Softening
Izod Impact, (12.7 Tensile Strength at Tensile Modulus,
ASTM D 1238, Point, ASTM
by 3.2 mm) ASTM Yield, ASTM D 638, ASTM D 638, min,
Descrip-
Condition 200/5.0 D 1525, Rate B, °C,
B C,D D
Group Description Class Description Grade
D 256, min, J/m min, MPa MPa
A
tion
g/10 min, min min 1000-g load
Injection molded Injection molded Injection molded Injection molded Injection molded
01 Crystal 1 General- 1 1.0 45 3100 100
Purpose 2 5.0 40 3000 95
3 10.0 35 2900 85
0 Other 0 Other Unspecified Unspecified
02 Rubber- 1 Medium- 1 1.0 40 34 2500 95
modified impact 2 5.0 40 28 2300 90
3 10.0 40 22 2000 85
0 Other Unspecified Unspecified
2 High-impact 1 1.0 80 20 2000 95
2 5.0 80 18 1800 90
3 10.0 80 16 1600 85
0 Other Unspecified Unspecified
3 Super-high- 1 1.0 120 14 1400 90
impact 2 5.0 120 12 1200 85
0 Other 0 Other Unspecified Unspecified
00 Other 0 0
A
Specimen may be pellets, powder, or parts cut into pieces that can fit into the barrel.
B
Method A, specimen are nominal 3.2-mm thick injection-molded and taken from the center of Type I
...
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