Fluorine‐containing polymers. I. Copolymers of perfluoro‐olefins

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Abstract
We have studied the copolymerization behavior of perfluoropropene, perfluorobutene‐1, perfluorobutene‐2, perfluoroisobutene, perfluoropentene‐1, and perfluorononene‐1. We have so far not succeeded in homopolymerizing these olefins. However, certain nonfluorinated, nonconjugated comonomers–ethylene, vinyl. chloride, vinyl acetate, and the vinyl alkyl ethers–were found to copolymerize readily, giving copolymers containing up to 50 mole per cent, and in some cases slightly more than this, of the perfluoro‐olefin in the copolymer. The higher members of the series copolymerize in general less readily than the lower members. The products ranged from viscous oils to tough, film‐forming solids. The difficulty of homopolymerization and the relative ease of copolymerization of the perfluoro‐olefins with the above comonomers are discussed and interpreted in terms of probable electron distributions around the double‐bond.

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