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Standard Classification System for Copolymers of Vinylidene Fluoride (VDF) with Other Fluorinated Monomers
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NORM herausgegeben am 15.3.2023
Bezeichnung normen: ASTM D5575-18(2023)
Ausgabedatum normen: 15.3.2023
SKU: NS-1136284
Zahl der Seiten: 12
Gewicht ca.: 36 g (0.08 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
This classification system covers both developing property designations and specifications for thermoplastic compositions consisting of vinylidene fluoride (VDF) polymers modified with other fluoromonomers and property-enhancing additives. Four property codes are presented: code 1 - melt temperature, code 2 - melt-flow rate or melt viscosity, or both, code 3 - tensile strength and modulus, and code 5 - density. The melt temperatures, melt-flow rate, melt viscosity, tensile properties, specific gravity, volume resistivity, dielectric constant, dissipation factor, and limiting oxygen index shall be tested to meet the requirements prescribed.
Keywords:
fluoropolymers, line callout, plastics, poly(vinylidene fluoride) copolymers,, ICS Number Code 83.080.20 (Thermoplastic materials)
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1.1?This classification system covers both developing property designations and specifications for thermoplastic compositions consisting of vinylidene fluoride (VDF) polymers modified with other fluoromonomers and property-enhancing additives. The other fluoromonomers include one or more of the following: hexafluoropropylene (HFP), tetrafluoroethylene (TFE), and chlorotrifluoroethylene (CTFE). The additives are those that improve its flame resistance, processing, or physical properties. However, these additives are not normally considered to be reinforcing. This classification system covers thermoplastic compositions supplied in pellet or powder forms. 1.2?A designation or specification applies only to the virgin polymers prepared from vinylidene fluoride (>50 weight %) with one or more of the following comonomers: hexafluoropropylene, tetrafluoroethylene, and chlorotrifluoroethylene. Some polymers contain additives to enhance certain properties. 1.3?This system constitutes a line callout as a means of designating and specifying properties of VDF-based copolymers. At least four of the designated properties are used to define a polymer's specification. Specification criteria from international documents can be used if their criteria match designation properties currently used by this classification system.1.4?The manufacturer of the virgin resin shall establish the designation of a resin based on the property value criteria in this classification system. 1.5?The minimum specification properties are established by this classification system. Additional specification properties, based on the designation properties cited, can be established by the resin supplier and customer. 1.6?The values stated in SI units are to be regarded as standard. 1.7?The property tests are intended to provide information for specifications of modified VDF-copolymer compositions. It is not the purpose of this classification system to provide engineering data for design purposes. Note 1:?Although the values listed in Table 1, Table 2, Table 3, Table 4, and Table 5 are necessary to include the
range of properties available in existing materials, they are not
to be interpreted as implying that every possible combination of
the properties exists or can be obtained. It is possible for a user
or designer, using Tables
1-5, to call out
property relationships that are physically impossible to occur in a
copolymer made using current technology.
Note 2:?Many of these polymers exhibit
polymorphism.1.8?Test
methods used in this classification system can result in the
incidental production of hazardous materials. Modified VDF polymer
fluoroplastics melt between 90 and 182?C (194 and 359?F) and are
thermally stable up to about 350?C (662?F), or somewhat higher,
depending on the composition. (1.9?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, health, and environmental practices
and determine the applicability of regulatory limitations prior to
use. Note 3:?Many, but not all of the codes and specifications
found in this classification system are also in ISO 12086-1 and ISO
12086-2.
1.10?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. |
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