Abstract
The changes in the surface structure and bonding of PTFE which occur on exposure to 1–2.5 KeV electrons have been studied by means of ESCA. The major effect is seen to be defluorination leading to an unsaturated carbonaceous network. In the initial stages of irradiation however some trifluoromethyl groups are generated, as also occurs during high energy irradiation of PTFE. Kinetic studies are shown to give information regarding the effect of dose rate, the vertical inhomogenity of reaction and the role of diffusion during irradiation. The depth of modification is found to be beyond the sampling depth of ESCA. No trend was observed in the energy dependence of damage over the range 1–2.5 KeV.
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