Radiation synthesis of acrylic acid onto poly(tetraflouroethylene-perflourovinyl ether) film: Chemical modifications and electrical conductivity |
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| Authors: | Mohamed Mohamady Ghobashy Ahmed M Elbarbary Naeem M El-Sawy Hany M Hosni |
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| Institution: | 1. Radiation Research of Polymer Chemistry dept, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egyptmohamed.ghobashy@eaea.org.eg;3. Radiation Research of Polymer Chemistry dept, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt;4. Department of Solid State Physics, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt |
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| Abstract: | Graft-polymerization of acrylic acid (AAc) monomer onto poly(tetraflouroethylene-perflouro vinyl ether) (PFA) copolymer film was carried out using gamma irradiation technique to synthesize grafted copolymer film PFA-g-PAAc (PFA-COOH). The effect of the dose on the degree of grafting of AAc onto PFA film was investigated. The results showed that the degree of grafting increases with increasing the irradiation dose. The grafted PFA-COOH] film was chemically modified by reaction with aniline to produce modified PFA-CO-NH-ph] film, followed by sulphonation reaction to introduce sulfonic acid (SO3H) groups to get other modified PFA-CO-NH-ph-SO3H] film. The chemical structures of the grafted and modified films were identified by FT-IR, XRD, and SEM. It is of particular interest to measure the electrical conductivity of grafted and modified membranes as a function of degree of grafting. It was found that the conductivity of the grafted films increases with increasing the degree of grafting, however a slightly increase in conductivity was observed in PFA-CO-NH-ph-SO3H] sample. The electrical conductivity property of the modified PFA membranes suggests their possible use for fuel cell applications. |
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| Keywords: | PFA grafting gamma radiation chemical modification and electrical conductivity |
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