EXCHANGE-REACTIONS ON SOLID-SURFACE INDUCED BY VUV UNDULATOR RADIATION

Quasi-monochromatic undulator radiation was applied to surface modific ation of poly-tetrafluoroethylene (PTFE), which is one of the most che mically stable polymeric materials. Solid-liquid interface was excited and fluorine atoms on the surface were replaced by oxygen-containing functional groups and hydrogen under VUV undulator light irradiation. The contact angle to water and XPS spectra were measured after the irr radiation. Experimental results show a water layer on PTFE surface pro motes the exchange reaction near the absorption edge(165-180nm).