Parameter Study for the Pre-Irradiation Grafting of Styrene/Divinylbenzene onto Poly(tetrafluoroethylene-co-hexafluoropropylene) from Isopropanol Solution

✍ Scribed by Timo Rager

• Book ID: 102257210
• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: German
• Weight: 133 KB
• Volume: 87
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.200490038

✦ Synopsis

Abstract

Pre‐irradiation grafting of styrene/divinylbenzene (DVB) onto poly(tetrafluoroethylene‐co‐hexafluoropropylene) (FEP) films from isopropanol (^i^PrOH) solution was investigated with respect to the effect of irradiation dose, film thickness, cross‐linker concentration, and reaction temperature. A mathematical model was applied to the kinetic curves to extract information on the polymerization rate, the radical‐recombination rate, and the grafting through time. It turned out that the two closely correlated reaction rates for polymerization and radical recombination can be varied over a wide range by changing the irradiation dose, the cross‐linker concentration, and the reaction temperature. On the other hand, the time until the grafting front has progressed to the center of the film is mainly affected by the film thickness and the reaction temperature. The formation of homopolymer in the grafting solution increases steeply with temperature and cross‐linker concentration.