Thermal and mechanical properties of radiation crosslinked poly(tetrafluoroethylene-co-perfluoromethyl vinyl ether) |
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| Authors: | John S Forsythe David JT Hill Anestis L Logothetis Tadao Seguchi Andrew K Whittaker |
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| Institution: | aPolymer Materials and Radiation Group, University of Queensland, St Lucia, Qld. 4072, Australia;bDuPont Dow Elastomers L.L.C., DuPont Experimental Station, P.O. Box 80328, Wilmington, DE 19880-0328, USA;cJapan Atomic Energy Research Institute, Takasaki Radiation Chemistry Research Establishment, 1233 Watanuki-cho, Takasaki-shi, Gunma 370-12, Japan;dCentre for Magnetic Resonance, University of Queensland, St Lucia, Qld. 4072, Australia |
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| Abstract: | The effect of irradiation temperature on the polymer properties was investigated for the fluoroelastomer poly(tetrafluoroethylene-co-perfluoromethylvinyl ether) (TFE/PMVE). TFE/PMVE samples were γ-irradiated to 150 kGy at temperatures ranging from 77 K to 373 K. Analysis of the sol/gel behaviour, tensile properties, and glass transition temperatures indicated that crosslinking commenced in the temperature range 195 to 263 K, for a dose of 150 kGy. The latter temperature was 13 K below the glass transition temperature. Crosslinking remained relatively constant to higher temperatures. Chain scission reactions were found to occur well below the glass transition temperature and increased at higher temperatures. The optimum temperature for the radiation crosslinking of TFE/PMVE, for the temperatures investigated, was 263 K. |
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