POLYMERS OF PERFLUOROHEXADIENE, PERFLUOROHEPTADIENE, AND PERFLUOROOCTADIENE

Perfluoro-1,5-hexadiene, perfluoro-1,6-heltadiene and perfluoro-1,7-octadiene have been prepared and preliminary polymerization studies on the three monomers carried out. Preparation of certain new compounds, perfluoro-1,6-heptadiene and some of its precursors, are reported for the first time. High pressure polymerization was successful in producing new polymers from these perfluorodienes. The polymers, however, were often insoluble and somewhat brittle. It is believed that trace impurities may be interfering with the polymerization process and causing crosslinking, and that greater efforts in purification of monomers must be made in order to obtain useful and thermally stable polymers. (Author)