Chlorotrifluoroethylene


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Chlorotrifluoroethylene

 

(CF2 = CFC1), a colorless gas with boiling point - 28.4°C; very poorly soluble in water, but readily soluble in organic solvents.

Chlorotrifluoroethylene has properties characteristic of fluorinated olefins; it readily undergoes radical polymerization and copolymerization with various vinyl monomers, such as tetrafluoroethylene, vinylidene fluoride, and ethylene. The compound is obtained by the dechlorination of 1,1,2-trichloro-1,2,2-trifluoroethane, CFC12—CF2C1, in the presence of zinc. It is stored in steel tanks. Inhibitors (1 percent tributylamine or dipentene) are added to prevent spontaneous polymerization.

Chlorotrifluoroethylene forms explosive mixtures with air in concentrations of 28.5–35.2 percent. It is used mainly for the production of polychlorotrifluoroethylene (a fluoroplastic), the co-polymer of chlorotrifluoroethylene with vinylidene fluoride, and chlorotrifluoroethylene telomers, which are used in the manufacture of chemically and thermally stable lubricants.

References in periodicals archive ?
Designed as an alternative for applications where high grade metals fail and PFA/PTFE are too expensive, Halar pipings and fittings offer a material composed of a copolymer of ethylene and chlorotrifluoroethylene (E-CTFE) that resists most acids, bases and solvents.
Although many fluoropolymers have been prepared, major commercial products are homopolymers and copolymers deriving from free radical polymerization of a limited number of fluoromonomers, such as tetrafluoroethylene (TFE), vinyl fluoride (VF), vinylidene fluoride (VF2), chlorotrifluoroethylene (CTFE), hexafluoropropylene (HFP), perfluoropropylvinylether (PFPVE) and perfluoromethylvinylether (PFMVE).
polyvinylfluoride, chlorotrifluoroethylene homopolymer, tetrafluoroethylene-ethylene copolyrner, vinylidenedifluoride-hexa fluoropropylene-tetrafluoroethylene terpolymer and other blends.
The most common commercially available fluoropolymers are based on monomers of tetrafluoroeth-ylene, vinylidene fluoride, and chlorotrifluoroethylene.
PVDF can copolymerize with many fluorinated alkene monomers, such as tetrafluoroethylene, chlorotrifluoroethylene, and hexafluoropropylene (HFP).
Similar reinforcement due to crystallinity in the binder was found in KF-800, a c opolymer of 3/1 mole ratio chlorotrifluoroethylene to vinylidene fluoride, in LX-17 PBX (14).