Polymerization Studies Leading to High Strength Chemical Resistant Elastomers Serviceable at Temperature Extremes
Abstract
The screening of potential catalysts for the polymerization of fluorinated olefins and dienes has been continued. The olefins investigated include vinylidene fluoride, hexafluoropropylene 1,1,2-trifluorobutadiene, hexafluorocyclobutene, 1,2-dichlorohexafluorocyclopentene and 1,1,2-trifluoro-2-chloro-3-ethynyl-3-methylcyclobutane. Copolymerizations of these with ethylene, with butadiene, or among themselves were studied. 1,1,2-Trifluorobutadiene can be polymerized with Ti(OBu)4-Al(i-Bu)3 catalyst and copolymerized with butadiene with the same catalyst or with TiI4-Al(i-Bu)3. 1,1,2-Trifluoro -2- chloro -3- ethynyl -3- methylcyclobutane can be polymerized with TiCl4-Al(i-Bu)3 catalyst. Hydrocarbon solvents are much preferable to halocarbon solvents for these polymerizations. Only low conversions were obtained in polymerizations of fluorinated acyclic olefins with electron-rich catalysts. Ring-opening polymerizations of fluoronated cyclic olefins with catalysts based on V, Ti, Mo, W, Cr, Rh or Ru have not been achieved.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1965
- Accession Number
- AD0480181
Entities
People
- A. N. Johnson
- D. I. Relyea
- H. P. Smith