Photopolymerization of vinyl fluoride

Procedme 3-1 outlines the procedure for the photopolymerization of vinyl fluoride. 

The first photopolymerization of VF was reported by Newkirk in 1946 [453]. By irradiation with UV light of a wavelength of 253.7 nm in a quartz capillary at 27 °C for 2 days, a yield of 36% polymer was obtained. Later [482], the photopolymerization of vinyl fluoride, in the presence of peroxide, was studied in bulk as well as in DMSO or in t-butanol solution (50% by volume of the total liquid monomer composition) within a temperature range of —20 to +30 °C. The monomer mixture was irradiated with a mercury UV lamp. It was found that high reaction rates could be obtained despite the fact that the polymer precipitated at an early stage. In DMSO, the precipitate was a gel that was partially transparent to light, and by continuous supply of monomer to the polymerization, a transparent bulk polymer was formed. 

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