Synthesis and characterisation of sulfonic acid-containing ion exchange membranes based on hydrocarbon and fluorocarbon polymers

Radiation-induced graft copolymerisation has been used to modify polymers with styrene to prepare pre-cursor copolymers that can be subsequently functionalised to produce ion exchange membranes. This paper describes the processes of simultaneous and pre-irradiation graft copolymerisation of styrene to modify hydrocarbon and fluorine-containing polymers and their sulfonation to produce hydrophilic membranes. The effect of varying the grafting conditions and their characterisation by ion exchange capacity, electrolytic resistivity and equilibrium water content is reported.

[1]  B. Gupta,et al.  Development of radiation‐grafted FEP‐g‐polystyrene membranes: Some property–structure correlations , 1994 .

[2]  B. Gupta,et al.  Materials research aspects of organic solid proton conductors , 1993 .

[3]  R. Wycisk,et al.  Polyethylene-poly(methacrylic acid-co-divinylbenzene) interpolymer-type carboxylic membranes , 1991 .

[4]  G. Odian,et al.  Principles of polymerization , 1981 .

[5]  B. Gupta,et al.  Thermal stability of proton exchange membranes prepared by grafting of styrene into pre‐irradiated FEP films and the effect of crosslinking , 1998 .

[6]  Toraj Mohammadi,et al.  Characterisation of novel composite membrane for redox flow battery applications , 1995 .

[7]  M. Torkkeli,et al.  Structure and properties of sulfonated poly [(vinylidene fluoride)–g-styrene] norous membranes porous membranes , 1996 .

[8]  M. Torkkeli,et al.  The state of water in styrene‐grafted and sulfonated poly(vinylidene fluoride) membranes , 1997 .

[9]  Adolphe Chapiro,et al.  Radiation Chemistry of Polymeric Systems , 1962 .

[10]  Fred W. Billmeyer,et al.  Textbook Of Polymer Science , 1971 .

[11]  O. Haas,et al.  Proton exchange membranes prepared by simultaneous radiation grafting of styrene onto Teflon-FEP films. Synthesis and characterization , 1993 .

[12]  A. Fane,et al.  Sulfonation of cross‐linked asymmetric membranes based on polystyrene and divinylbenzene , 1994 .

[13]  B. Gupta,et al.  Cation exchange membranes by pre-irradiation grafting of styrene into FEP films. I: Influence of synthesis conditions , 1994 .