Grafting of styrene into pre-irradiated fluoropolymer films: Influence of base material and irradiation temperature |
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| Authors: | Uwe Lappan Uwe Geißler Uwe Gohs Steffi Uhlmann |
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| Institution: | 1. Mechanics and Materials Science, Schlumberger-Doll Research, Cambridge, MA, USA;2. Sensor Physics, Schlumberger-Doll Research, Cambridge, MA, USA;3. Reservoir Geosciences, Schlumberger-Doll Research, Cambridge, MA, USA;1. Campus Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, E.N. 10, 2686-953 Sacavém, Portugal;2. Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal;3. REQUINTE/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;2. School of Chemical Engineering, Qinghai University, Xining 810016, China |
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| Abstract: | In this study, the influence of irradiation temperature on mechanical properties of three fluoropolymers and on grafting of styrene into the polymers by the pre-irradiation method was investigated. Electron paramagnetic resonance spectroscopy and infrared spectroscopy were used to characterize the irradiated polymers regarding trapped radical species and changes in the chemical structure, respectively. For poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) the irradiation temperature was found to be an important factor for tensile strength and elongation at break of the pre-irradiated film. No strong effect of irradiation temperature on the mechanical properties was noticed for poly(tetrafluoroethylene-co-ethylene) (ETFE); however the yield of grafting drops at high irradiation temperatures. Finally, mechanical properties of poly(tetrafluoroethylene) (PTFE) were found to be dramatically altered, even if the film was irradiated at elevated temperature. |
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