Fluorocarbons polyvinylidene fluoride

Suitable Plastics Fluorocarbons, chlorinated poly ether, polyvinylidene fluoride, polypropelene, high-density polyethylene, and epoxy glass. 

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. 

Chlorofluorocarbon resin Chlorofluorohydrocarbon resin Ethylene-chloro-tri-fluoroethylene copolymer Ethylene-tetra-fluoroethylene copolymer Fluorinated ethylene-propylene resin Fluorocarbon resin Fluorohydrocarbon resin Perfluoroalkoxy resin Polychlorotrifluoroethylene Polytetrafluoroethylene Polyvinylidene fluoride... 

Polyvinylidene fluoride n. (-H2CCF2-) . Thermoplastic fluorocarbon polymer derived from vinylidene fluoride. It is a fluoropolymer with alternating CFi2 and CF2 groups. PVDF is an opaque white resin. Extremely pure, it is superior for non-contaminating applications. In film form it is characterized by superior weather and UV resistance. Abbreviation is PVDF. 

Vinylidene fluoride (1,1-difluoroethylene) n, H2C=CF2. a colorless, nearly odorless gas prepared by the dehydrohalogenation of 1-chlorol,l-difluoroethane, or by the dehalo-genation of l,2-dichloro-l,l-difluorethane. It polymerizes readily in the presence of free-radical initiators to produce the homopolymer polyvinylidene fluoride, and is also co-polymerized with olefins and other fluorocarbon monomers to make fluorocarbon elastomers. (See image). 

Fluorocarbons Molded,Extruded (Con t) Ceramic reinforced (PTFE) Fluorinated ethylene propylene(FEP) Polyvinylidene— fluoride (PVDF) Noninflammable Noninflammable Self extinguishing... 

Ureas Molded Cellulose filled (ASTM Type 2) Melamines Molded Unfilled Fluorocarbons Molded,Extruded Polyvinylidene—fluoride (PVDF) Diallyl Phthalates Molded Asbestos Filled 0.042 0.044 0.048—0.162 0.05 0.05—0.03 (Dry)... 

Fluorocarbons Molded,Extruded Polyvinylidene—fluoride (PVDF) 0.184... 

The macromolecule of polyvinylidene fluoride (PVDF) consists of a linear chain in which the predominant monomer unit is [—CH —CF —] . PVDF has good weathering resistance and it is resistant to most chemicals and solvents but less inert than PTFE, PFA and FEP in the same conditions. PVDF is nonflammable and exhibits greater mechanical strength, wear and creep resistance than other fluorocarbons. PVDF is heat resistant up to 150°C. However, the material is much more workable and has been made into essentially any shape necessary for the chemical process industry. Complete pumps, valves, piping, smaller vessels, and other hardware have been made and have served successfully. The material may also be applied as a coating or as a liner. 

Pyrolant compositions based on finely divided Mg particles and fluorocarbons are susceptible to chemical degradation. This degradation also termed ageing is known to have at least two main causes reaction of magnesium with moisture and an inherent reactivity between Mg and its basic compounds with fluoroelastomer binders prone to eliminate HF, such as Viton A or polyvinylidene fluoride (PVDF). 

Fluorocarbon binders such as polyvinylidene fluoride (PVDF) have been proposed as oxidizers in obscurant formulations [10]. For a formulation similar as the one shown below, the content of polyaromatic compounds in the soot has been determined. Six hundred grams of the payload were burned, and the generated aerosol was collected from the combustion chamber on a filter with a volume flow rate of 2 m h ... 

Additionally, any suitable fluorocarbon may be used as a toner release material. Preferred fluorocarbons include polyvinylidene fluoride such as that sold under the trademark Kynar and manufactured by the Penwalt Corporation. ... 

Wet chlorine is very corrosive to all of the more common construction metals. At low pressures wet chlorine can be handled in chemical stoneware, glass or porcelain equipment and in certain alloys. Hard rubber, polyvinyl chloride (maximum of 41 kPa (6 psig)), fiberglass-reinforced polyester, polyvinylidene chloride or fluoride and frilly halogenated fluorocarbon resins have been used successfully. For maximum working pressure see Chlorine Pamphlet 6 [9]. All of these materials must be selected with care. For higher pressures, lined metallic or compatible metallic systems should be used. In the metallic systems, Hastelloy C, titanium and tantalum have been used. Within limits, titanium may be used with wet chlorine, but must not be used with dry chlorine under any circumstances because it bums spontaneously on contact. Tantalum is inert to wet and dry chlorine at temperatures up to 300°F(149°C). 

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