Published September 1983
This report deals with polytetrafluoroethylene (PTFE), and copolymers of tetrafluoroethylene with hexafluoropropylene, perfluoropropylperfluorovinyl ether, and ethylene. For PTFE, both the suspension process for making three grades (finely divided resin, presintered resin, and agglomerated resin), and the emulsion process for making coagulated resin and concentrated emulsion, are evaluated.
SRI also evaluates the manufacture of the monomers for the above, viz., tetrafluoroethylene, hexafluoropropylene, perfluoropropylperfluorovinyl ether. The last named monomer is made from perfluoropropionyl fluoride and hexafluoropropylene oxide; their manufacture is evaluated too.
Also included in this report is a systematic study of fluorinated ion-exchange membranes which are made from a copolymer of tetrafluoroethylene and a perfluorinated vinyl ether with a carboxylic or sulfonic acid end group. The manufacture of perfluorinated vinyl ether, its copolymerization with tetrafluoroethylene to form an ion-exchange resin, and the processing of this resin to form a membrane, are all evaluated.
Other PEP Related Reports: