Sulfonation of styrene‐grafted poly(vinylidene fluoride) films
2001; Wiley; Volume: 81; Issue: 7 Linguagem: Inglês
10.1002/app.1587
ISSN1097-4628
AutoresNadia Walsby, Mikael Paronen, J. Juhanoja, Franciska Sundholm,
Tópico(s)Analytical Chemistry and Sensors
ResumoAbstract Electron‐beam irradiated and styrene‐grafted poly(vinylidene fluoride) films are sulfonated with chlorosulfonic acid in dichloroethane under various conditions. The impact of the reaction time, the concentration of the sulfonating agent, and the reaction temperature on the properties of the sulfonated film is examined. Sulfonation proceeds via a reaction front mechanism. Sulfonation of surface‐grafted films is incomplete at room temperature. The number of side reactions taking place appears to be linearly dependent on the concentration of the sulfonation solution. Dimensional changes suggest that sulfone crosslinking is significant at higher concentrations. This reduces the ion‐exchange capacity and proton conductivity of the films but increases the resistance to oxidation in a H 2 O 2 solution. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1572–1580, 2001
Referência(s)