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Polyvinylidene fluoride PVF

A fuel cell utilizing UDMH as fuel and N02 as oxidant is reported. Operated intermittently over a 3-month period with degradation, it consistently produced a power density of 40mw/ cm2 (40w/ft2). The cell consists of a sandwich of Zr acid phosphate in a polyvinylidene fluoride (PVF) binder and diffuse-catalyst layers of Pt black, Zr acid phosphate and PVF. Pt screens are used as current collectors] 3) G.R. Eske-lund et al, Chemical-Mechanical Mine , PATR 3724 (1968) [A mine feasibility study is reported in which the hypergolic system UDMH—... [Pg.44]

Polyarylate (PAR) Polycarbonate (PQ Polyesters turated polye.stea- (TS polyester) Thermoplastic polyesters Polybutylcne terephthalate (PBT) Polyethylene terephthalate (PET) Unsaturated polyester (TS polyester) Polyvinylidene fluoride (PVF)... [Pg.111]

PVDF polyvinylidene fluoride PVF polyvinyl fluoride PVP polyvinyl pyrrolidone PVT pressure-volume-temperature (also P-V-T or pvT)... [Pg.489]

PVF = Polyvinylfluoride, PVF2 = polyvinylidene fluoride, PVF = polytrifluoroethylene, PTFE = polytetrafluoroethylene. [Pg.63]

Polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF) cross-link upon irradiation, particularly with the use of prorads, such as TAG, TIAG, diallyl itaconate, ethylene bis-maleimide, and others. ... [Pg.100]

PVC, another widely used polymer for wire and cable insulation, crosslinks under irradiation in an inert atmosphere. When irradiated in air, scission predominates.To make cross-linking dominant, multifunctional monomers, such as trifunctional acrylates and methacrylates, must be added. Fluoropolymers, such as copol5miers of ethylene and tetrafluoroethylene (ETFE), or polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), are widely used in wire and cable insulations. They are relatively easy to process and have excellent chemical and thermal resistance, but tend to creep, crack, and possess low mechanical stress at temperatures near their melting points. Radiation has been found to improve their mechanical properties and crack resistance. Ethylene propylene rubber (EPR) has also been used for wire and cable insulation. When blended with thermoplastic polyefins, such as low density polyethylene (LDPE), its processibility improves significantly. The typical addition of LDPE is 10%. Ethylene propylene copolymers and terpolymers with high PE content can be cross-linked by irradiation. ... [Pg.185]

Fluoropolymers, such as copolymer of ethylene and tetrafluoroethylene (ETFE), polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), are widely used in wire and cable insulations. They are relatively easy to process and have excellent chemical and thermal resistance, but tend to creep, crack and possess low mechanical stress at temperatures near their melting points. Radiation has been found to improve their mechanical properties and crack resistance.36... [Pg.157]

PC PE PES PET PF PFA PI PMMA PP PPO PS PSO PTFE PTMT PU PVA PVAC PVC PVDC PVDF PVF TFE SAN SI TP TPX UF UHMWPE UPVC Polycarbonate Polyethylene Polyether sulfone Polyethylene terephthalate Phenol-formaldehyde Polyfluoro alkoxy Polyimide Polymethyl methacrylate Polypropylene Polyphenylene oxide Polystyrene Polysulfone Polytetrafluoroethylene Polytetramethylene terephthalate (thermoplastic polyester) Polyurethane Polyvinyl alcohol Polyvinyl acetate Polyvinyl chloride Polyvinyl idene chloride Polyvinylidene fluoride Polyvinyl fluoride Polytelrafluoroethylene Styrene-acrylonitrile Silicone Thermoplastic Elastomers Polymethylpentene Urea formaldehyde Ultrahigh-molecular-weight polyethylene Unplasticized polyvinyl chloride... [Pg.106]

Fluorinated ethylene propylene (FEP) Pol y tet raftuoroe th ylene (FTFE) Polyvinyl fluoride (PVF) Polyvinylidene fluoride (PVDF) lonomer Ketone... [Pg.5]

The family of FPs, also called fluorocarbon plastics, is based on polymers made of monomers composed of fluorine and carbon may also include chlorine atoms in their structure. Specific types include polytetrafluoroethylene (PTFE), polytetrafluoroethylene-cohexafluoro-propylene or fluorinated ethylene propylene (FEP), polytrafluoroethylene-coperfluoropropylvinyl ether (PFA), ethylenetetrafluoroethylene (ETFE). polychlorotrifluoroethylene (PCTFE), ethylene-chlorotri-fluoroethylene (ECTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), perfluoromethylvinylether (PFMV), perfluoroalkoxy (PFA), etc. [Pg.73]

Polyvinylidene fluoride (PVDF) is considerably less thermally stable than PTFE but much more stable than polyvinyl fluoride (PVF) or polychlorotrifluoroethylene (PCTFE). Certain inorganic compounds (silica, titanium dioxide, and antimony oxide) can catalyze its decomposition at temperatures above 375°C (707°F) [10], ETFE degradation is autocatalytic and similar to that of PVDF and is accompanied by the evolution of hydrogen fluoride (HF). Iron and transition metal salts can accelerate the degradation of ETFE by dehydrofluorination and oligomer formation [10], Copper salts have been found to stabilize the polymer [11], ETFE decomposes rapidly at temperatures above 380°C (716°F) [11],... [Pg.172]

Polytetrafluoroethylene (PTFE Teflon) was discovered accidently by PlunkettCZ nd commercialized by DuPont in the 1940 s. This polymer has a solubility parameter of about 6H and a high melting point of 327°C and is not readily moldable. Poly-chlorotrifluoroethylene (CTFE, Kel-F), the copolymer of tetrafluoroethylene and hexafluoropropylene (FEP), polyvinylidene fluoride (PVDF, Kynar), the copolymer of tetrafluoroethylene and ethylene (ETFE), the copolymer of vinylidene fluoride and hexafluoroisobutylene (CM-1), perfluoroalkoxyethylene (PFA) and polyvinyl fluoride (PVF, Tedlar) are all more readily processed than PTFE. However, the lubricity and chemical resistance of these fluoropolymers is less than that of PTFE. [Pg.92]

PVDC (polyvinylidene chloride) s PVF (polyvinyl fluoride) s PVDF (polyvinylidene fluoride) s Urea (urea formaldehyde)... [Pg.166]

There are a number of other polymers in this family including polychlorotrifluoroethylene (PCTFE), polyvinyl fluoride (PVF), polyvinylidene fluoride, ethylene chlorotrifluoroethylene (ECTFE), tetrafluoroethylene/hexafluoropropylene/vi-nylidene fluoride terpolymers, and chlorotrifluo-roethylene/vinyl ether copolymers. [Pg.4]

PVCC. See Polyvinyl chloride, chlorinated PVC/PVA PVCA/A copolymer. See Vinyl chloride/vinyl acetate copolymer PVDC. See Polyvinylidene chloride PVDF. See Polyvinylidene fluoride resin PVE. See Polyvinyl ethyl ether PVF PVFM. See Polyvinyl formal PVI. See Polyvinyl isobutyl ether PVM. See Polyvinyl methyl ether PVM/MA. See PVM/MA copolymer PVM/MA copolymer CAS 9011-16-9 52229-50-2 Synonyms 2,5-Furandione, polymer with methoxyethene 2,5-Furandione, polymer with methoxyethylene Methyl vinyl ether/maleic anhydride copolymer Poly (maleic anhydride-methyi vinyl ether) Poly (methyl vinyl ether-alt-maleic anhydride)... [Pg.3779]

The principal materials used for pyroelectric detectors are members of the TGS group, lithium tantalate, strontium barium niobate, ceramics members of the lead zirconate titanate (PZT) group and, more recently, films of the polymers polyvinyl fluoride (PVF) and polyvinylidene fluoride (PVFj). [Pg.92]

This is a typical structure for many chain polymers, i.e. PE, PVC, PTFE, but can also occur with step polymerizations, e.g. polyethers (starting from cyclic ethers) and polysiloxanes (starting from R2SiCl2). Normally head-to-tail combination occurs in vinyl polymerization (Figure 1.1). Rarely does head-to-head interaction occur—exceptions include polyvinyl fluoride (PVF) and polyvinylidene difluoride (PVDF) where 20% head-to-head polymerization takes place, whereas with polypropylene (PP) < 0.5% occurs. [Pg.15]

Acrylics (ACR), polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF). [Pg.184]

Part Two describes the fabrication techniques for various fluoropolymers. They include perfluoroalkoxy polymer (PFA), fluorinated ethylene-propylene polymer (FEP), polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-chlo-rotrifluoroethylene copolymer (ECTFE), and polyvinyl fluoride (PVF). Major fabrication techniques including injection molding, extrusion, compression... [Pg.1]

Certain polymers, such as polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), possess special properties in the film form, caileApiezoelectricity and pyroelectricity. Piezoelectricity is electric polarization of a film produced by mechanical strain in some crystals. The polarization is proportional to the amount of strain and changes sign with it. The reverse is true and an electrical polarization induces a mechanical strain in piezoelectric sensors. Pyroelectricity is electric polarization of a film induced by thermal absorption in some polymer crystals. The induced polarization is proportional to the level of thermal change. These properties can be used in the manufacture of transducers, microphones, loudspeakers, pressure gauges, pickup heads, hydrophones, motion sensors, and other devices from biaxially oriented PVDF films. Table 13.37 gives the properties of a piezoelectric film of polyvinylidene fluoride. [Pg.427]

See other pages where Polyvinylidene fluoride PVF is mentioned: [Pg.341]    [Pg.5]    [Pg.98]    [Pg.111]    [Pg.126]    [Pg.205]    [Pg.455]    [Pg.341]    [Pg.5]    [Pg.98]    [Pg.111]    [Pg.126]    [Pg.205]    [Pg.455]    [Pg.163]    [Pg.16]   
See also in sourсe #XX -- [ Pg.2 , Pg.65 ]

See also in sourсe #XX -- [ Pg.2 , Pg.182 ]



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Polyvinylidene

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