Tetrafluoroethylene → HCID 86747576, compound

Participants

Reaction Steps

A 400-mL pressure vessel was loaded with 100 mL of bis(perfluoro-n-butyl) sulfide. The pressure vessel was then chilled and maintained around -20° C. while further loading with 20 mL of 0.05M HFPO dimer peroxide in bis(perfluoro-n-butyl) sulfide, pulling the air off with a vacuum pump, adding 5 g of perfluoropropylvinyl ether, and finally adding 50 g of tetrafluoroethylene. Polymerization set in during warm up, pressure dropping from 96 psi at 4.4° C. to 86 psi at 85° C. over a 14 minute period. The pressure continued to drop, falling to 3 psi four to five hours later at 35° C. The product was washed three times with 200 mL of 1:1 methanol:water, filtered, and dried under vacuum, giving 58 g of white powder (~100% conversion). Infrared analysis found 3.7 wt % perfluoropropylvinyl ether in the copolymer with tetrafluoroethylene. The polymer extruded through a melt indexer at 0.4 g/min at 372° C. with a 15-kg weight.

Provenance & Evidence