ASTM D5575-18(2023) PDF

ABSTRACT 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. SCOPE 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.2 This classification system is not intended for the selection of materials. 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. Position 5 Position 6 Position 7 Position 8 Code Specific Gravity, g/cm3 Code Electrical a-c Dielectric Constant Loss d-c Electric Volume Code Limiting Oxygen Index Code Specimen Type a a >10E3 a a D638 Type I b 1.6 to b 10E3 to 10E12 b 40 to b D638 Type II c 1.7 to c >10E12 c 50 to c D638 Type III d 1.8 to d d 60 to d D638 Type IV e 1.9 to e e 70 to e ISO 527 Type 1A f 2.0 to f f 80 to f ISO 527 Type 1B g 2.1 to g g >90 g ISO 527 Typ...