ASTM D4549-03

Standard Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS)

ABSTRACT
This specification, which covers polystyrene materials, both crystal and rubber modified suitable for molding and extrusion, is intended to be a means of calling out plastic materials used in the fabrication of end items or parts. Polystyrene materials are classified according to classes after being grouped as crystal, rubber modified, and others. The materials are further classified according to grades after being grouped as general-purpose, other medium impact, high impact, super-high-impact, and others. The materials shall conform to the prescribed injection molded properties and natural colors.
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.

General Information

• Status: Historical
• Publication Date: 09-Aug-2003
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D4549-00 - Standard Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS)
• Effective Date: 10-Aug-2003
• Replaced By: ASTM D4549-11 - Standard Classification System and Basis for Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS)
• Effective Date: 01-Apr-2011
• Referred By: ASTM C1047-19 - Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base
• Effective Date: 10-Aug-2003
• Referred By: ASTM D955-21 - Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
• Effective Date: 10-Aug-2003
• Referred By: ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
• Effective Date: 10-Aug-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4549 – 03
Standard Specification for
Polystyrene and Rubber-Modified Polystyrene Molding and
1
Extrusion Materials (PS)
This standard is issued under the fixed designation D4549; 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* D1238 Test Method for Melt Flow Rates of Thermoplastics
by Extrusion Plastometer
1.1 This specification covers polystyrene materials, both
D1525 Test Method for Vicat Softening Temperature of
crystal and rubber modified, suitable for molding and extru-
Plastics
sion. Recycled polystyrene products are addressed in Specifi-
D1600 Terminology for Abbreviated Terms Relating to
cation D5676.
Plastics
1.2 This specification is intended to be a means of calling
D2584 Test Method for Ignition Loss of Cured Reinforced
out plastic materials used in the fabrication of end items or
Resins
parts. Material selection should be made by those having
D3892 Practice for Packaging/Packing of Plastics
expertise in the plastics field after careful consideration of the
D4000 Classification System for Specifying Plastic Materi-
design and the performance required of the part, the environ-
als
ment to which it will be exposed, the fabrication process to be
D5676 Specification for Recycled Polystyrene Molding and
employed, the inherent properties of the material other than
3
Extrusion Materials
those covered by this specification, and the economics.
E105 Practice for Probability Sampling of Materials
1.3 The properties included in this specification are those
4
2.2 ISO Standards:
required to identify the compositions covered. Other require-
ISO 1622-1-2 Polystyrene (PS) Molding and Extrusion Ma-
ments necessary to identify particular characteristics important
terials
to specialized applications can be called out using the suffixes
ISO 2897-1-2 Impact Resistant Polystyrene (PS-I) Molding
as given in Section 5.
and Extrusion Materials
NOTE 1—ThisstandardcombineselementsfromISO1622-1-2andISO
2897-1-2, but is not equivalent to either ISO standard.
3. Terminology
3.1 Definitions — For definitions of technical terms pertain-
2. Referenced Documents
ing to plastics used in this specification, see Terminology
2
2.1 ASTM Standards:
D883.
D256 Test Methods for Determining the Izod Pendulum
Impact Resistance of Plastics
4. Classification
D638 Test Method for Tensile Properties of Plastics
4.1 Polystyrene materials are classified into groups in ac-
D648 Test Method for Deflection Temperature of Plastics
cordance with classes and grades as shown in the basic
Under Flexural Load in the Edgewise Position
property table (Table PS). Injection molded properties are the
D790 Test Methods for Flexural Properties of Unreinforced
preferred standard and are used for the basis of call out
and Reinforced Plastics and Electrical Insulating Materials
examples.
D792 Test Methods for Density and Specific Gravity (Rela-
NOTE 2—Since compression molded properties have been removed
tive Density) of Plastics by Displacement
from the standard with this publication, refer to previous publications of
D883 Terminology Relating to Plastics
this standard, if interested in these properties.
NOTE 3—An example of this classification system for PS0111 is as
follows: The designation PS0111 would indicate: PS = polystyrene as
1
This specification is under the jurisdiction of ASTM Committee D20 on
found in Terminology D1600, 01 (group) = crystal polystyrene, 1 (class)
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
= general-purpose, and 1 (grade) = minimum-grade requirements as found
Materials.
in Table PS.
Current edition approved Aug. 10, 2003. Published October 2003. Originally
approved in 1985. Last previous edition approved in 2000 as D4549 – 00. DOI:
10.1520/D4549-03.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Withdrawn. The last approved version of this historical standard is referenced
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM on www.astm.org.
4
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.
*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.
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D4549 – 03
4.1.1 To facilitate the incorporation of future or special numbers for the new requirements in the designated order as
materials, the “other/u
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