Stability of radicals in electron-irradiated fluoropolymer film for the preparation of graft copolymer fuel cell electrolyte membranes

Mikkel Juul Larsen, Yue Ma, Huan Qian, Hans Toftlund Nielsen, Peter Brilner Lund, Eivind Morten Skou

Research output: Contribution to conference without publisher/journalPosterResearch

Abstract

This presentation concerns the stability of radicals generated in poly(ethylene-alt-tetra­fluoro­ethylene) (ETFE) film by electron irradiation prior to grafting of styrene onto this base material. It has been demonstrated that the grafting yield decreases as the storage time of the irradiated film increases, and by ESR this has been shown to be due to decay of the polymerization-initiating radicals in the film material. The decay rate is found to depend on the storage temperature, and it may also depend on the type of radicals present in the film. Furthermore the conducted investigations have shown that the radicals are almost entirely consumed in the grafting process.
Original languageEnglish
Publication date2008
Number of pages1
Publication statusPublished - 2008
Event14th International Conference on Solid State Protonic Conductors - Kyoto, Japan
Duration: 7. Sep 200811. Oct 2008
Conference number: 14

Conference

Conference14th International Conference on Solid State Protonic Conductors
Number14
CountryJapan
CityKyoto
Period07/09/200811/10/2008

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Keywords

  • Radicals, peroxy radicals, radical stability, radical lifetime, ESR, EPR, electron irradiation, fluoropolymer, fuel cell, membrane, grafting, polystyrene

Cite this

Larsen, M. J., Ma, Y., Qian, H., Nielsen, H. T., Lund, P. B., & Skou, E. M. (2008). Stability of radicals in electron-irradiated fluoropolymer film for the preparation of graft copolymer fuel cell electrolyte membranes. Poster session presented at 14th International Conference on Solid State Protonic Conductors, Kyoto, Japan.