Fluorovinyl monomer

L.E. Wolinski, Fluorovinyl Monomers , in Vinyl and Diene Monomers , E.C. Leonard, Ed, J. Wiley, NY (1971), 1321-28 [This survey article presents circa 1971 information on all aspects of VF2. Several facets of this article are of interest the expl concn limits of the monomer with air is reported as 5.8 to 20.3%, and the fact that spontaneous polymerization of the monomer does not occur] 5) W.L. Elban, The Development of an Inert Simulant for HNS/ Teflon Explosive , NOL TR 72-255 (1972)... 

FIGURE 16.9 Structure of copolymers based on perfluoro-3-methylene-2,4-dioxabicyclo [3,3,0] octane (Figure 16.5 F) with fluorovinyl monomers. 

Perfluoro-2-inethylene-l,3-dioxolane monomers copolymerizes with various commercially available fluorovinyl monomers, too. Perfluoro-3-methylene-2,4-dioxabicyclo [3,3,0] octane (Figure 16.5F) was copolymerized with chlorotrifluo-roethylene (CTFE), perfluoropropyl vinyl ether, perfluoromethyl vinyl ether, and vinylidene fluoride [23] by a free radical initiator such as perfluorodibenzoylperox-ide or tert-butyl peroxypivalate in bulk or in solution, respectively (see Figure 16.9). 

Fig. 1. SAE J200 Classification system for ASTM No. 3 oil where in volume swell nr = no requirement. EPDM is ethylene—propylene—diene monomer HR, butyl mbber SBR, styrene—butadiene mbber NR, natural mbber VMQ, methyl vinyl siUcone CR, chloroprene FKM, fluoroelastomer FVMQ, fluorovinyl methyl siUcone ACM, acryUc elastomers HSN, hydrogenated nitrile ECO, epichlorohydrin and NBR, nitrile mbber.

Hydroxy-containing fluorovinyl ether monomers (5,6) were prepared in excellent yields (80-90%) in a single step from the corresponding esters (1,3)12"14 with sodium borohydride in absolute ethanol. Protection of the sensitive vinyl ether groups was not required during the reduction. In contrast, the use of a more powerful reducing agent, such as lithium aluminum hydride, resulted in the reduction of the double bond ... 

The decarboxylation of fluorinated compounds to form fluorinated alkenes has now become very important for the preparation of fluorinated vinyl ethers. These perfluoroalkyl per-fluorovinyl ethers are used as monomers for copolymerization with fluorinated alkenes. in particular tetrafluoroethene. 1,1-difluoroethene, and hexafluoropropene. ... 

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