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ASTM D 4634 Document Information:
Title
Standard Specification for Styrene-Maleic Anhydride Materials (S/MA)
ASTM International
Publication Date:
Oct 1, 2004
Scope:
(Footnote *)
This specification covers styrene-maleic anhydride materials suitable
for molding or extrusion.
This specification does not apply to alloys or blends of
styrene-maleic anhydride materials with
non-elastomeric thermoplastics. Styrene-maleic anhydride materials,
being thermoplastic, are
reprocessable and recyclable. This specification allows for the use of
those materials provided
that all the specific requirements of this specification are met.
The properties included in this standard are those required to
identify the compositions covered.
There may be other requirements necessary to identify particular
characteristics important to
specialized applications. These will be agreed upon between the user
and the supplier, by using the
suffixes as given in Section 5.
This classification system and subsequent line call out
(specification) are intended to provide
means of calling out properties of plastic materials used in the
fabrication of end items or parts.
It is not intended for the selection of materials. Materials should be
selected 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, costs involved, and the inherent properties of the material
other than those covered by
this classification system.
The values stated in SI units are to be regarded as the standard.
The following precautionary caveat pertains only to the test methods
portion, Section 11, of this
specification. 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 - There is no equivalent or similar ISO standard for S/MA.
Footnote * - A Summary of Changes section appears at the end of this
standard.
Keywords:
- extrusion
- high-heat resistant
- molding
- styrene copolymers
- styrene-maleic anhydride
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