Tetrafluoroethylene → Hfp tfe
Reaction equation
[F:1][C:2]([F:9])([F:8])[C:3]([F:7])=[C:4]([F:6])[F:5].[F:10][C:11]([F:15])=[C:12]([F:14])[F:13]>>[F:10][C:11]([F:15])=[C:12]([F:14])[F:13].[F:1][C:2]([F:9])([F:8])[C:3]([F:7])=[C:4]([F:6])[F:5]Participants
Reactant 2
Product 1
Procedure
A 400-mL pressure vessel was loaded with 100 mL of deionized water. The pressure vessel was then chilled and maintained around -20° C. while further loading with 5 mL of 0.06M HFPO dimer peroxide in octafluoro-1,4-dithiane, pulling the air off with a vacuum pump, adding 240 g of hexafluoropropylene, and finally adding 50 g of tetrafluoroethylene. Polymerization was carried out at ~35° C. with pressure dropping from 118 to 102 psi over about 4 to 5 hours. The product was washed two times with 200 mL of methanol and once with 200 mL of Freon® 113, filtered, and dried under vacuum, giving 33.8 g of white powder. Infrared analysis found 9.0 wt % hexafluoropropylene in the copolymer suggesting ~61% conversion on the part of the tetrafluoroethylene. Under melt indexer conditions, melt flow was 4.0 g/min at 372° C. with a 5-kg weight.
Workup
- customat 372° C.
Sources & evidence
- ORD record
- ord-67093df0889443b2bdbb2ba78bd304e2
- Source dataset
- uspto-grants-1994_02
- Patent number
- US05286822
Reaction notes
Loading…