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ASTM D3222-21
Standard Specification for Unmodified Poly(Vinylidene Fluoride) (PVDF) Molding Extrusion and Coating Materials
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NORMA vydána dne 1.9.2021
Informace o normě:
Označení normy: ASTM D3222-21
Datum vydání normy: 1.9.2021
Kód zboží: NS-1036249
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D3222-21 :
This specification covers melt processable unmodified poly(vinylidene fluoride) (PVDF) molding, extrusion and coating materials. This specification covers only virgin homopolymer prepared from vinylidene fluoride supplied in form of pellet or powder and shall be free of foreign matter. Two types covered by this specification are type I PVDF fluoroplastics and type II PVDF fluoroplastics. Detailed requirements that shall conform to this specification include peak melting endotherm, specific gravity, refractive index, limiting oxygen index, flow rate, rheological properties, tensile properties, flexural properties, impact resistance, D-C resistance, dielectric strength, dielectric constant, and dissipation factor. Preparation of compression molded specimen shall be in accordance to this specification.
Keywords:
extrusion materials, fluorohydrocarbon plastics, fluoropolymers, molding materials, polyvinylidene fluoride (PVDF),, ICS Number Code 83.080.20 (Thermoplastic materials)
Doplňující informace
| 1. Scope | ||||||||||||||||||||||||||||||||
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1.1?This specification covers melt processable molding and extrusion materials, as well as coating materials of poly(vinylidene fluoride) fluoroplastic, commonly abbreviated PVDF (or PVF1.2?This specification applies only to the virgin homopolymer prepared from vinylidene fluoride, not copolymers, reinforced, filled grades or special grades with additives or treatments for modification of attributes. 1.3?The tests involved are intended to provide information for specification of unmodified PVDF homopolymer resins. It is not the purpose of this specification to provide engineering data for design purposes. 1.4?PVDF fluoroplastics melt between 156 and 180?C (312 and 356?F) and are thermally stable up to about 370?C (698?F). (WarningEvolution of corrosive and toxic hydrogen fluoride can occur under certain conditions.) 1.5?The values stated in SI units, as detailed in IEEE/ASTM S-10, are to be regarded as the standard. The values given in parentheses are for information only. Note 1:?PVDF exhibits polymorphism.2
The type and extent of crystalline structure varies with the
thermomechanical history of the sample. Specimens prepared by
techniques different than prescribed in this specification can have
properties that vary from the values specified.
1.6?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 2:?There is no equivalent ISO standard for this specification. Information in this specification is technically equivalent to related information in ISO 12086-1 and ISO 12086-2. 1.7?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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| 2. Referenced Documents | ||||||||||||||||||||||||||||||||
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