Die emulsionscopolymerisation von tetrafluorethylen mit propylen bei niedrigen temperaturen

✍ Scribed by Kojima, Gen ;Hisasue, Michio

• Publisher: Wiley (John Wiley & Sons)
• Year: 1981
• Weight: 427 KB
• Volume: 182
• Category: Article
• ISSN: 0025-116X
• DOI: 10.1002/macp.1981.021820515

✦ Synopsis

Abstract

Tetrafluoroethylene and propylene were copolymerized in emulsion at low temperatures (≈25°C) by use of a redox catalyst containing ammonium peroxodisulfate, ferrous sulfate, ethylenediaminetetraacetic acid (EDTA) and hydroxymethane sulfinate. The kinetical study suggested that the working mechanism of the catalyst conforms the following scheme:
magnified image
where the reduction of the ferric ion seems to be rate determining (i.e. k~1~ ≫ k~2~) and the hydroxyl ion plays an important role. The overall polymerization reaction is supposed to proceed according to the Case I of the Smith‐Ewart theory under the experimental conditions examined.